[Solved] Upgrade to NC16

upgrade to NC16, finiched Personal Overview shoes new version and everything is fine.

Sorry to hear you’re facing problems :slightly_frowning_face:

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[/details]

Nextcloud version (eg, 16.0.1):
Operating system and version (eg, Ubuntu 16.04 L>TS):
Apache or nginx version (eg, Apache 2.4.18):
PHP version (eg, 7.2.18):

I’ve upgrades from NC15 to NC16, previously all ran just fine.
The issue you are facing: syncho on desktop and app not working anymore
the web interface works for a couple of file types (images) but not for the rest PDF, etc
In those cases I get an Error

Is this the first time you’ve seen this error? (Y/N): Y

Internal Server Error

Technical details

  • Remote Address: 85.2.134.108
  • Request ID: AH1WoWoswVQfo7UfnvBG

Steps to replicate it:

  1. browse folders and find any PDF
  2. click on PDF to open it
  3. Error

Sync-icon of nextcould is also on red with connection closed
unable to access files

The output of your Nextcloud log in Admin > Logging:

{"reqId":"YsCkDBliBCirXfTyC46x","level":3,"time":"2019-05-16T21:08:41+00:00","remoteAddr":"85.2.134.108","user":"--","app":"core","method":"GET","url":"/cron.php","message":{"Exception":"Doctrine\\DBAL\\Exception\\SyntaxErrorException","Message":"An exception occurred while executing 'INSERT INTO \"oc_file_locks\" (\"key\", \"lock\", \"ttl\") VALUES(?, ?, ?) ON CONFLICT DO NOTHING' with params [\"files\\/a2f5fc60e89cd39a54e210dea0093018\", -1, 1558044521]:\n\nSQLSTATE[42601]: Syntax error: 7 ERROR:  syntax error at or near \"ON\"\nLINE 1: ..._locks\" (\"key\", \"lock\", \"ttl\") VALUES($1, $2, $3) ON CONFLIC...\n                                                             ^","Code":0,"Trace":[{"file":"/var/www/nextcloud/3rdparty/doctrine/dbal/lib/Doctrine/DBAL/DBALException.php","line":184,"function":"convertException","class":"Doctrine\\DBAL\\Driver\\AbstractPostgreSQLDriver","type":"->","args":["An exception occurred while executing 'INSERT INTO \"oc_file_locks\" (\"key\", \"lock\", \"ttl\") VALUES(?, ?, ?) ON CONFLICT DO NOTHING' with params [\"files\\/a2f5fc60e89cd39a54e210dea0093018\", -1, 1558044521]:\n\nSQLSTATE[42601]: Syntax error: 7 ERROR:  syntax error at or near \"ON\"\nLINE 1: ..._locks\" (\"key\", \"lock\", \"ttl\") VALUES($1, $2, $3) ON CONFLIC...\n                                                             ^",{"errorInfo":["42601",7,"ERROR:  syntax error at or near \"ON\"\nLINE 1: ..._locks\" (\"key\", \"lock\", \"ttl\") VALUES($1, $2, $3) ON CONFLIC...\n                                                             ^"],"__class__":"Doctrine\\DBAL\\Driver\\PDOException"}]},{"file":"/var/www/nextcloud/3rdparty/doctrine/dbal/lib/Doctrine/DBAL/DBALException.php","line":158,"function":"wrapException","class":"Doctrine\\DBAL\\DBALException","type":"::","args":[{"__class__":"Doctrine\\DBAL\\Driver\\PDOPgSql\\Driver"},{"errorInfo":["42601",7,"ERROR:  syntax error at or near \"ON\"\nLINE 1: ..._locks\" (\"key\", \"lock\", \"ttl\") VALUES($1, $2, $3) ON CONFLIC...\n                                                             ^"],"__class__":"Doctrine\\DBAL\\Driver\\PDOException"},"An exception occurred while executing 'INSERT INTO \"oc_file_locks\" (\"key\", \"lock\", \"ttl\") VALUES(?, ?, ?) ON CONFLICT DO NOTHING' with params [\"files\\/a2f5fc60e89cd39a54e210dea0093018\", -1, 1558044521]:\n\nSQLSTATE[42601]: Syntax error: 7 ERROR:  syntax error at or near \"ON\"\nLINE 1: ..._locks\" (\"key\", \"lock\", \"ttl\") VALUES($1, $2, $3) ON CONFLIC...\n                                                             ^"]},{"file":"/var/www/nextcloud/3rdparty/doctrine/dbal/lib/Doctrine/DBAL/Connection.php","line":1088,"function":"driverExceptionDuringQuery","class":"Doctrine\\DBAL\\DBALException","type":"::","args":[{"__class__":"Doctrine\\DBAL\\Driver\\PDOPgSql\\Driver"},{"errorInfo":["42601",7,"ERROR:  syntax error at or near \"ON\"\nLINE 1: ..._locks\" (\"key\", \"lock\", \"ttl\") VALUES($1, $2, $3) ON CONFLIC...\n                                                             ^"],"__class__":"Doctrine\\DBAL\\Driver\\PDOException"},"INSERT INTO \"oc_file_locks\" (\"key\", \"lock\", \"ttl\") VALUES(?, ?, ?) ON CONFLICT DO NOTHING",{"1":"files/a2f5fc60e89cd39a54e210dea0093018","2":-1,"3":1558044521}]},{"file":"/var/www/nextcloud/lib/private/DB/Connection.php","line":216,"function":"executeUpdate","class":"Doctrine\\DBAL\\Connection","type":"->","args":["INSERT INTO \"oc_file_locks\" (\"key\", \"lock\", \"ttl\") VALUES(?, ?, ?) ON CONFLICT DO NOTHING",["files/a2f5fc60e89cd39a54e210dea0093018",-1,1558044521],[2,2,2]]},{"file":"/var/www/nextcloud/lib/private/DB/AdapterPgSql.php","line":49,"function":"executeUpdate","class":"OC\\DB\\Connection","type":"->","args":["INSERT INTO \"oc_file_locks\" (\"key\", \"lock\", \"ttl\") VALUES(:dcValue1, :dcValue2, :dcValue3) ON CONFLICT DO NOTHING",{"dcValue1":"files/a2f5fc60e89cd39a54e210dea0093018","dcValue2":-1,"dcValue3":1558044521},{"dcValue1":2,"dcValue2":2,"dcValue3":2}]},{"file":"/var/www/nextcloud/lib/private/DB/Connection.php","line":261,"function":"insertIgnoreConflict","class":"OC\\DB\\AdapterPgSql","type":"->","args":["file_locks",{"key":"files/a2f5fc60e89cd39a54e210dea0093018","lock":-1,"ttl":1558044521}]},{"file":"/var/www/nextcloud/lib/private/Lock/DBLockingProvider.php","line":139,"function":"insertIgnoreConflict","class":"OC\\DB\\Connection","type":"->","args":["file_locks",{"key":"files/a2f5fc60e89cd39a54e210dea0093018","lock":-1,"ttl":1558044521}]},{"file":"/var/www/nextcloud/lib/private/Lock/DBLockingProvider.php","line":200,"function":"initLockField","class":"OC\\Lock\\DBLockingProvider","type":"->","args":["files/a2f5fc60e89cd39a54e210dea0093018",-1]},{"file":"/var/www/nextcloud/lib/private/Files/Storage/Common.php","line":715,"function":"acquireLock","class":"OC\\Lock\\DBLockingProvider","type":"->","args":["files/a2f5fc60e89cd39a54e210dea0093018",2]},{"file":"/var/www/nextcloud/lib/private/Files/Storage/Wrapper/Wrapper.php","line":593,"function":"acquireLock","class":"OC\\Files\\Storage\\Common","type":"->","args":["scanner::files_versions",2,{"__class__":"OC\\Lock\\DBLockingProvider"}]},{"file":"/var/www/nextcloud/lib/private/Files/Cache/Scanner.php","line":331,"function":"acquireLock","class":"OC\\Files\\Storage\\Wrapper\\Wrapper","type":"->","args":["scanner::files_versions",2,{"__class__":"OC\\Lock\\DBLockingProvider"}]},{"file":"/var/www/nextcloud/lib/private/Files/View.php","line":1332,"function":"scan","class":"OC\\Files\\Cache\\Scanner","type":"->","args":["files_versions",false]},{"file":"/var/www/nextcloud/lib/private/Files/View.php","line":1376,"function":"getCacheEntry","class":"OC\\Files\\View","type":"->","args":[{"cache":null,"scanner":{"__class__":"OC\\Files\\Cache\\Scanner"},"watcher":null,"propagator":null,"updater":null,"__class__":"OC\\Files\\Storage\\Wrapper\\Quota"},"files_versions","/files_versions"]},{"file":"/var/www/nextcloud/apps/files_versions/lib/Storage.php","line":158,"function":"getFileInfo","class":"OC\\Files\\View","type":"->","args":["/jdebosset/files_versions"]},{"file":"/var/www/nextcloud/apps/files_versions/lib/Storage.php","line":747,"function":"getVersionsSize","class":"OCA\\Files_Versions\\Storage","type":"::","args":["jdebosset"]},{"file":"/var/www/nextcloud/apps/files_versions/lib/Command/Expire.php","line":62,"function":"expire","class":"OCA\\Files_Versions\\Storage","type":"::","args":["Documents/FIEFK/XXX-GRP-FIEF/FIEF Management/rdiff-backup.odt","jdebosset"]},{"file":"/var/www/nextcloud/lib/private/Command/CommandJob.php","line":35,"function":"handle","class":"OCA\\Files_Versions\\Command\\Expire","type":"->","args":[]},{"file":"/var/www/nextcloud/lib/private/BackgroundJob/Job.php","line":61,"function":"run","class":"OC\\Command\\CommandJob","type":"->","args":["O:33:\"OCA\\Files_Versions\\Command\\Expire\":2:{s:43:\"\u0000OCA\\Files_Versions\\Command\\Expire\u0000fileName\";s:61:\"Documents/FIEFK/XXX-GRP-FIEF/FIEF Management/rdiff-backup.odt\";s:39:\"\u0000OCA\\Files_Versions\\Command\\Expire\u0000user\";s:9:\"jdebosset\";}"]},{"file":"/var/www/nextcloud/lib/private/BackgroundJob/QueuedJob.php","line":44,"function":"execute","class":"OC\\BackgroundJob\\Job","type":"->","args":[{"__class__":"OC\\BackgroundJob\\JobList"},{"__class__":"OC\\Log"}]},{"file":"/var/www/nextcloud/cron.php","line":146,"function":"execute","class":"OC\\BackgroundJob\\QueuedJob","type":"->","args":[{"__class__":"OC\\BackgroundJob\\JobList"},{"__class__":"OC\\Log"}]}],"File":"/var/www/nextcloud/3rdparty/doctrine/dbal/lib/Doctrine/DBAL/Driver/AbstractPostgreSQLDriver.php","Line":74,"Previous":{"Exception":"Doctrine\\DBAL\\Driver\\PDOException","Message":"SQLSTATE[42601]: Syntax error: 7 ERROR:  syntax error at or near \"ON\"\nLINE 1: ..._locks\" (\"key\", \"lock\", \"ttl\") VALUES($1, $2, $3) ON CONFLIC...\n                                                             ^","Code":"42601","Trace":[{"file":"/var/www/nextcloud/3rdparty/doctrine/dbal/lib/Doctrine/DBAL/Connection.php","line":1079,"function":"execute","class":"Doctrine\\DBAL\\Driver\\PDOStatement","type":"->","args":[]},{"file":"/var/www/nextcloud/lib/private/DB/Connection.php","line":216,"function":"executeUpdate","class":"Doctrine\\DBAL\\Connection","type":"->","args":["INSERT INTO \"oc_file_locks\" (\"key\", \"lock\", \"ttl\") VALUES(?, ?, ?) ON CONFLICT DO NOTHING",["files/a2f5fc60e89cd39a54e210dea0093018",-1,1558044521],[2,2,2]]},{"file":"/var/www/nextcloud/lib/private/DB/AdapterPgSql.php","line":49,"function":"executeUpdate","class":"OC\\DB\\Connection","type":"->","args":["INSERT INTO \"oc_file_locks\" (\"key\", \"lock\", \"ttl\") VALUES(:dcValue1, :dcValue2, :dcValue3) ON CONFLICT DO NOTHING",{"dcValue1":"files/a2f5fc60e89cd39a54e210dea0093018","dcValue2":-1,"dcValue3":1558044521},{"dcValue1":2,"dcValue2":2,"dcValue3":2}]},{"file":"/var/www/nextcloud/lib/private/DB/Connection.php","line":261,"function":"insertIgnoreConflict","class":"OC\\DB\\AdapterPgSql","type":"->","args":["file_locks",{"key":"files/a2f5fc60e89cd39a54e210dea0093018","lock":-1,"ttl":1558044521}]},{"file":"/var/www/nextcloud/lib/private/Lock/DBLockingProvider.php","line":139,"function":"insertIgnoreConflict","class":"OC\\DB\\Connection","type":"->","args":["file_locks",{"key":"files/a2f5fc60e89cd39a54e210dea0093018","lock":-1,"ttl":1558044521}]},{"file":"/var/www/nextcloud/lib/private/Lock/DBLockingProvider.php","line":200,"function":"initLockField","class":"OC\\Lock\\DBLockingProvider","type":"->","args":["files/a2f5fc60e89cd39a54e210dea0093018",-1]},{"file":"/var/www/nextcloud/lib/private/Files/Storage/Common.php","line":715,"function":"acquireLock","class":"OC\\Lock\\DBLockingProvider","type":"->","args":["files/a2f5fc60e89cd39a54e210dea0093018",2]},{"file":"/var/www/nextcloud/lib/private/Files/Storage/Wrapper/Wrapper.php","line":593,"function":"acquireLock","class":"OC\\Files\\Storage\\Common","type":"->","args":["scanner::files_versions",2,{"__class__":"OC\\Lock\\DBLockingProvider"}]},{"file":"/var/www/nextcloud/lib/private/Files/Cache/Scanner.php","line":331,"function":"acquireLock","class":"OC\\Files\\Storage\\Wrapper\\Wrapper","type":"->","args":["scanner::files_versions",2,{"__class__":"OC\\Lock\\DBLockingProvider"}]},{"file":"/var/www/nextcloud/lib/private/Files/View.php","line":1332,"function":"scan","class":"OC\\Files\\Cache\\Scanner","type":"->","args":["files_versions",false]},{"file":"/var/www/nextcloud/lib/private/Files/View.php","line":1376,"function":"getCacheEntry","class":"OC\\Files\\View","type":"->","args":[{"cache":null,"scanner":{"__class__":"OC\\Files\\Cache\\Scanner"},"watcher":null,"propagator":null,"updater":null,"__class__":"OC\\Files\\Storage\\Wrapper\\Quota"},"files_versions","/files_versions"]},{"file":"/var/www/nextcloud/apps/files_versions/lib/Storage.php","line":158,"function":"getFileInfo","class":"OC\\Files\\View","type":"->","args":["/jdebosset/files_versions"]},{"file":"/var/www/nextcloud/apps/files_versions/lib/Storage.php","line":747,"function":"getVersionsSize","class":"OCA\\Files_Versions\\Storage","type":"::","args":["jdebosset"]},{"file":"/var/www/nextcloud/apps/files_versions/lib/Command/Expire.php","line":62,"function":"expire","class":"OCA\\Files_Versions\\Storage","type":"::","args":["Documents/FIEFK/XXX-GRP-FIEF/FIEF Management/rdiff-backup.odt","jdebosset"]},{"file":"/var/www/nextcloud/lib/private/Command/CommandJob.php","line":35,"function":"handle","class":"OCA\\Files_Versions\\Command\\Expire","type":"->","args":[]},{"file":"/var/www/nextcloud/lib/private/BackgroundJob/Job.php","line":61,"function":"run","class":"OC\\Command\\CommandJob","type":"->","args":["O:33:\"OCA\\Files_Versions\\Command\\Expire\":2:{s:43:\"\u0000OCA\\Files_Versions\\Command\\Expire\u0000fileName\";s:61:\"Documents/FIEFK/XXX-GRP-FIEF/FIEF Management/rdiff-backup.odt\";s:39:\"\u0000OCA\\Files_Versions\\Command\\Expire\u0000user\";s:9:\"jdebosset\";}"]},{"file":"/var/www/nextcloud/lib/private/BackgroundJob/QueuedJob.php","line":44,"function":"execute","class":"OC\\BackgroundJob\\Job","type":"->","args":[{"__class__":"OC\\BackgroundJob\\JobList"},{"__class__":"OC\\Log"}]},{"file":"/var/www/nextcloud/cron.php","line":146,"function":"execute","class":"OC\\BackgroundJob\\QueuedJob","type":"->","args":[{"__class__":"OC\\BackgroundJob\\JobList"},{"__class__":"OC\\Log"}]}],"File":"/var/www/nextcloud/3rdparty/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOStatement.php","Line":143,"Previous":{"Exception":"PDOException","Message":"SQLSTATE[42601]: Syntax error: 7 ERROR:  syntax error at or near \"ON\"\nLINE 1: ..._locks\" (\"key\", \"lock\", \"ttl\") VALUES($1, $2, $3) ON CONFLIC...\n                                                             ^","Code":"42601","Trace":[{"file":"/var/www/nextcloud/3rdparty/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOStatement.php","line":141,"function":"execute","class":"PDOStatement","type":"->","args":[null]},{"file":"/var/www/nextcloud/3rdparty/doctrine/dbal/lib/Doctrine/DBAL/Connection.php","line":1079,"function":"execute","class":"Doctrine\\DBAL\\Driver\\PDOStatement","type":"->","args":[]},{"file":"/var/www/nextcloud/lib/private/DB/Connection.php","line":216,"function":"executeUpdate","class":"Doctrine\\DBAL\\Connection","type":"->","args":["INSERT INTO \"oc_file_locks\" (\"key\", \"lock\", \"ttl\") VALUES(?, ?, ?) ON CONFLICT DO NOTHING",["files/a2f5fc60e89cd39a54e210dea0093018",-1,1558044521],[2,2,2]]},{"file":"/var/www/nextcloud/lib/private/DB/AdapterPgSql.php","line":49,"function":"executeUpdate","class":"OC\\DB\\Connection","type":"->","args":["INSERT INTO \"oc_file_locks\" (\"key\", \"lock\", \"ttl\") VALUES(:dcValue1, :dcValue2, :dcValue3) ON CONFLICT DO NOTHING",{"dcValue1":"files/a2f5fc60e89cd39a54e210dea0093018","dcValue2":-1,"dcValue3":1558044521},{"dcValue1":2,"dcValue2":2,"dcValue3":2}]},{"file":"/var/www/nextcloud/lib/private/DB/Connection.php","line":261,"function":"insertIgnoreConflict","class":"OC\\DB\\AdapterPgSql","type":"->","args":["file_locks",{"key":"files/a2f5fc60e89cd39a54e210dea0093018","lock":-1,"ttl":1558044521}]},{"file":"/var/www/nextcloud/lib/private/Lock/DBLockingProvider.php","line":139,"function":"insertIgnoreConflict","class":"OC\\DB\\Connection","type":"->","args":["file_locks",{"key":"files/a2f5fc60e89cd39a54e210dea0093018","lock":-1,"ttl":1558044521}]},{"file":"/var/www/nextcloud/lib/private/Lock/DBLockingProvider.php","line":200,"function":"initLockField","class":"OC\\Lock\\DBLockingProvider","type":"->","args":["files/a2f5fc60e89cd39a54e210dea0093018",-1]},{"file":"/var/www/nextcloud/lib/private/Files/Storage/Common.php","line":715,"function":"acquireLock","class":"OC\\Lock\\DBLockingProvider","type":"->","args":["files/a2f5fc60e89cd39a54e210dea0093018",2]},{"file":"/var/www/nextcloud/lib/private/Files/Storage/Wrapper/Wrapper.php","line":593,"function":"acquireLock","class":"OC\\Files\\Storage\\Common","type":"->","args":["scanner::files_versions",2,{"__class__":"OC\\Lock\\DBLockingProvider"}]},{"file":"/var/www/nextcloud/lib/private/Files/Cache/Scanner.php","line":331,"function":"acquireLock","class":"OC\\Files\\Storage\\Wrapper\\Wrapper","type":"->","args":["scanner::files_versions",2,{"__class__":"OC\\Lock\\DBLockingProvider"}]},{"file":"/var/www/nextcloud/lib/private/Files/View.php","line":1332,"function":"scan","class":"OC\\Files\\Cache\\Scanner","type":"->","args":["files_versions",false]},{"file":"/var/www/nextcloud/lib/private/Files/View.php","line":1376,"function":"getCacheEntry","class":"OC\\Files\\View","type":"->","args":[{"cache":null,"scanner":{"__class__":"OC\\Files\\Cache\\Scanner"},"watcher":null,"propagator":null,"updater":null,"__class__":"OC\\Files\\Storage\\Wrapper\\Quota"},"files_versions","/files_versions"]},{"file":"/var/www/nextcloud/apps/files_versions/lib/Storage.php","line":158,"function":"getFileInfo","class":"OC\\Files\\View","type":"->","args":["/jdebosset/files_versions"]},{"file":"/var/www/nextcloud/apps/files_versions/lib/Storage.php","line":747,"function":"getVersionsSize","class":"OCA\\Files_Versions\\Storage","type":"::","args":["jdebosset"]},{"file":"/var/www/nextcloud/apps/files_versions/lib/Command/Expire.php","line":62,"function":"expire","class":"OCA\\Files_Versions\\Storage","type":"::","args":["Documents/FIEFK/XXX-GRP-FIEF/FIEF Management/rdiff-backup.odt","jdebosset"]},{"file":"/var/www/nextcloud/lib/private/Command/CommandJob.php","line":35,"function":"handle","class":"OCA\\Files_Versions\\Command\\Expire","type":"->","args":[]},{"file":"/var/www/nextcloud/lib/private/BackgroundJob/Job.php","line":61,"function":"run","class":"OC\\Command\\CommandJob","type":"->","args":["O:33:\"OCA\\Files_Versions\\Command\\Expire\":2:{s:43:\"\u0000OCA\\Files_Versions\\Command\\Expire\u0000fileName\";s:61:\"Documents/FIEFK/XXX-GRP-FIEF/FIEF Management/rdiff-backup.odt\";s:39:\"\u0000OCA\\Files_Versions\\Command\\Expire\u0000user\";s:9:\"jdebosset\";}"]},{"file":"/var/www/nextcloud/lib/private/BackgroundJob/QueuedJob.php","line":44,"function":"execute","class":"OC\\BackgroundJob\\Job","type":"->","args":[{"__class__":"OC\\BackgroundJob\\JobList"},{"__class__":"OC\\Log"}]},{"file":"/var/www/nextcloud/cron.php","line":146,"function":"execute","class":"OC\\BackgroundJob\\QueuedJob","type":"->","args":[{"__class__":"OC\\BackgroundJob\\JobList"},{"__class__":"OC\\Log"}]}],"File":"/var/www/nextcloud/3rdparty/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOStatement.php","Line":141}},"CustomMessage":"Error while running background job (class: OC\\Command\\CommandJob, arguments: O:33:\"OCA\\Files_Versions\\Command\\Expire\":2:{s:43:\"\u0000OCA\\Files_Versions\\Command\\Expire\u0000fileName\";s:61:\"Documents/FIEFK/XXX-GRP-FIEF/FIEF Management/rdiff-backup.odt\";s:39:\"\u0000OCA\\Files_Versions\\Command\\Expire\u0000user\";s:9:\"jdebosset\";})"},"userAgent":"Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:66.0) Gecko/20100101 Firefox/66.0","version":"16.0.1.1","id":"5cddd15943aa5"}

The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):

<?php
$CONFIG = array (
  'instanceid' => 'xxx',
  'passwordsalt' => 'xxx',
  'secret' => 'xxx',
  'trusted_domains' =>
  array (
    0 => 'x.xxx.ch',
  ),
  'session_lifefime' => 600,
  'session_keepalive' => false,
  'remember_login_cookie_lifetime' => 660,
  'datadirectory' => '/var/www/nextcloud/data',
  'overwrite.cli.url' => 'https://x.xxx.ch',
  'dbtype' => 'pgsql',
  'version' => '16.0.1.1',
  'installed' => true,
  'memcache.local' => '\\OC\\Memcache\\APCu',
  'mail_smtpmode' => 'smtp',
  'mail_smtpauthtype' => 'LOGIN',
  'mail_smtpsecure' => 'tls',
  'mail_from_address' => 'nextcloud',
  'mail_domain' => 'debosset.ch',
  'mail_smtpauth' => 1,
  'mail_smtphost' => 'mail.xxx.ch',
  'mail_smtpport' => '587',
  'mail_smtpname' => 'smtp@xxx.ch',
  'mail_smtppassword' => 'xxx',
  'maintenance' => false,
  'theme' => '',
  'loglevel' => 2,
  'updater.secret' => '$2y$10$xx.xx/xx',
  'dbname' => 'XX_XX',
  'dbhost' => 'localhost',
  'dbuser' => 'user_nextcloud',
  'dbpassword' => 'xxx',
);
~                                 

The output of your Apache/nginx/system log in /var/log/____:

[Thu May 16 15:32:51.634600 2019] [authz_core:error] [pid 6583] [client 85.2.134.108:57944] AH01630: client denied by server configuration: /var/www/nextcloud/config
[Thu May 16 15:33:23.636161 2019] [authz_core:error] [pid 3175] [client 85.2.134.108:57948] AH01630: client denied by server configuration: /var/www/nextcloud/config
[Thu May 16 15:33:55.638062 2019] [authz_core:error] [pid 3425] [client 85.2.134.108:57952] AH01630: client denied by server configuration: /var/www/nextcloud/config
[Thu May 16 15:34:27.642224 2019] [authz_core:error] [pid 31464] [client 85.2.134.108:57956] AH01630: client denied by server configuration: /var/www/nextcloud/config
[Thu May 16 15:34:59.649939 2019] [authz_core:error] [pid 3426] [client 85.2.134.108:57960] AH01630: client denied by server configuration: /var/www/nextcloud/config
[Thu May 16 15:35:31.627981 2019] [authz_core:error] [pid 3175] [client 85.2.134.108:57964] AH01630: client denied by server configuration: /var/www/nextcloud/config
[Thu May 16 15:35:58.631092 2019] [authz_core:error] [pid 22167] [client 85.2.134.108:57968] AH01630: client denied by server configuration: /var/www/nextcloud/config
[Thu May 16 15:36:03.660770 2019] [authz_core:error] [pid 3426] [client 85.2.134.108:57972] AH01630: client denied by server configuration: /var/www/nextcloud/config
[Thu May 16 15:48:05.642278 2019] [authz_core:error] [pid 22167] [client 178.197.239.123:60762] AH01630: client denied by server configuration: /var/www/nextcloud/data/.ocdata
[Thu May 16 15:51:33.054022 2019] [authz_core:error] [pid 3485] [client 178.197.239.123:60771] AH01630: client denied by server configuration: /var/www/nextcloud/data/.ocdata
[Thu May 16 15:51:50.185972 2019] [authz_core:error] [pid 4569] [client 178.197.239.123:60776] AH01630: client denied by server configuration: /var/www/nextcloud/data/.ocdata
[Thu May 16 15:52:59.879699 2019] [authz_core:error] [pid 4568] [client 178.197.239.123:60788] AH01630: client denied by server configuration: /var/www/nextcloud/data/.ocdata
[Thu May 16 15:54:17.294882 2019] [authz_core:error] [pid 4603] [client 178.197.239.123:61552] AH01630: client denied by server configuration: /var/www/nextcloud/data/.ocdata
[Thu May 16 22:34:50.533282 2019] [authz_core:error] [pid 23925] [client 85.2.134.108:33814] AH01630: client denied by server configuration: /var/www/nextcloud/data/.ocdata
[Thu May 16 22:54:32.506338 2019] [authz_core:error] [pid 25408] [client 85.2.134.108:35244] AH01630: client denied by server configuration: /var/www/nextcloud/data/.ocdata
[Thu May 16 23:01:55.038506 2019] [authz_core:error] [pid 25410] [client 85.2.134.108:35662] AH01630: client denied by server configuration: /var/www/nextcloud/data/.ocdata