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Sorry to hear you’re facing problems 
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In order to help you as quickly as possible, before clicking Create Topic please provide as much of the below as you can. Feel free to use a pastebin service for logs, otherwise either indent short log examples with four spaces:
example
Or for longer, use three backticks above and below the code snippet:
longer
example
here
Some or all of the below information will be requested if it isn’t supplied; for fastest response please provide as much as you can 
Nextcloud version (eg, 12.0.2): 17.0.2
Operating system and version (eg, Ubuntu 17.04): FreeNAS-11.2-U7 (nextcloud is installed as plugin/jail)
Apache or nginx version (eg, Apache 2.4.25): nginx/1.16.1
PHP version (eg, 7.1): 7.1.33
The issue you are facing: I, by mistake, hit the button update in the FreeNAS jail and messed up my nextcloud. I change the version in the nextcloud file and could get back the website, but now I cannot see the files. I’m trying to get them with this command without success: su -m www -c php occ files:scan. Thank you in advance for your help.
Is this the first time you’ve seen this error? (Y/N): Y
Steps to replicate it:
- hit
updatebutton in the nextcloud jail in FreeNAS
The output of your Nextcloud log in Admin > Logging:
Level
App Message Time
Error PHP A non-numeric value encountered at /usr/local/www/nextcloud/apps/serverinfo/lib/OperatingSystems/DefaultOs.php#52 2020-01-07T09:41:39-0500
Fatal webdav OCA\DAV\Connector\Sabre\Exception\Forbidden: No read permissions 2020-01-07T09:24:16-0500
Fatal webdav OCA\DAV\Connector\Sabre\Exception\Forbidden: No read permissions 2020-01-07T09:23:57-0500
Fatal webdav OCA\DAV\Connector\Sabre\Exception\Forbidden: No read permissions 2020-01-07T07:22:45-0500
Fatal webdav OCA\DAV\Connector\Sabre\Exception\Forbidden: No read permissions 2020-01-07T07:22:36-0500
Fatal webdav OCA\DAV\Connector\Sabre\Exception\Forbidden: No read permissions 2020-01-07T07:12:58-0500
Fatal webdav OCA\DAV\Connector\Sabre\Exception\Forbidden: No read permissions 2020-01-07T07:12:48-0500
Fatal webdav OCA\DAV\Connector\Sabre\Exception\Forbidden: No read permissions 2020-01-07T07:12:32-0500
Warning user_ldap Configuration Error (prefix s01): login filter does not contain %uid place holder. 2020-01-06T22:34:59-0500
Warning user_ldap Configuration Error (prefix s01): Not a single Base DN given. 2020-01-06T22:34:59-0500
Warning user_ldap Configuration Error (prefix s01): No LDAP Login Filter given! 2020-01-06T22:34:59-0500
Error PHP A non-numeric value encountered at /usr/local/www/nextcloud/apps/serverinfo/lib/OperatingSystems/DefaultOs.php#52 2020-01-06T22:33:03-0500
Fatal webdav OCA\DAV\Connector\Sabre\Exception\Forbidden: No read permissions 2019-12-27T15:51:50-0500
Fatal webdav OCA\DAV\Connector\Sabre\Exception\Forbidden: No read permissions 2019-12-27T15:44:49-0500
Fatal webdav OCA\DAV\Connector\Sabre\Exception\Forbidden: No read permissions 2019-12-27T15:37:13-0500
Fatal webdav OCA\DAV\Connector\Sabre\Exception\Forbidden: No read permissions 2019-12-27T15:33:33-0500
Fatal webdav OCA\DAV\Connector\Sabre\Exception\Forbidden: No read permissions 2019-12-27T15:07:35-0500
The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):
<?php
$CONFIG = array (
'apps_paths' =>
array (
0 =>
array (
'path' => '/usr/local/www/nextcloud/apps',
'url' => '/apps',
'writable' => true,
),
1 =>
array (
'path' => '/usr/local/www/nextcloud/apps-pkg',
'url' => '/apps-pkg',
'writable' => true,
),
),
'logfile' => '/var/log/nextcloud/nextcloud.log',
'memcache.local' => '\\OC\\Memcache\\APCu',
'instanceid' => 'ocbew87jg1qv',
'passwordsalt' => 'salt',
'secret' => 'secret',
'trusted_domains' =>
array (
0 => '192.168.10.10',
),
'datadirectory' => '/usr/local/www/nextcloud/data',
'dbtype' => 'mysql',
'version' => '17.0.2.1',
'overwrite.cli.url' => 'http://192.168.10.10',
'dbname' => 'nextcloud',
'dbhost' => 'localhost',
'dbport' => '',
'dbtableprefix' => 'oc_',
'dbuser' => 'oc_usnxtlbet',
'dbpassword' => 'password',
'installed' => true,
'ldapIgnoreNamingRules' => false,
'ldapProviderFactory' => 'OCA\\User_LDAP\\LDAPProviderFactory',
'maintenance' => false,
'theme' => '',
'loglevel' => 2,
'updater.secret' => 'secret',
);
The output of your Apache/nginx/system log in /var/log/nginx/error.log:
2020/01/07 09:14:06 [warn] 4265#100570: *40907 an upstream response is buffered
to a temporary file /var/tmp/nginx/fastcgi_temp/6/85/0000001856 while reading up
stream, client: 192.168.1.82, server: _, request: "PROPFIND /remote.php/dav/file
s/servtecnico2/compartidos/serviciotecnico/BASE/Documentos%20ST/3-Reportes%20de%
20Servicio HTTP/1.1", upstream: "fastcgi://unix:/var/run/nextcloud-php-fpm.sock:
", host: "192.168.1.28"
2020/01/07 09:21:08 [warn] 4265#100570: *42027 an upstream response is buffered
to a temporary file /var/tmp/nginx/fastcgi_temp/7/85/0000001857 while reading up
stream, client: 192.168.1.82, server: _, request: "GET /remote.php/dav/files/ser
vtecnico2/compartidos/serviciotecnico/ARCHIVOS%20ST/1-David/2-Formatos/Protocolo
%20verificaci%C3%B3n%20SZM-LED1.xls HTTP/1.1", upstream: "fastcgi://unix:/var/ru
n/nextcloud-php-fpm.sock:", host: "192.168.1.28"
2020/01/07 09:21:43 [warn] 4265#100570: *42027 an upstream response is buffered
to a temporary file /var/tmp/nginx/fastcgi_temp/8/85/0000001858 while reading up
stream, client: 192.168.1.82, server: _, request: "GET /remote.php/dav/files/ser
vtecnico2/compartidos/serviciotecnico/ARCHIVOS%20ST/1-David/3-Cotizaciones/0-Par
tes%20de%20Repuesto/Heidolph/Cd%202012/Ersatzteile%20-%20spare%20parts/SPARE%20P
ARTS%20BOX/SPARE%20PARTS%20BOX.xls HTTP/1.1", upstream: "fastcgi://unix:/var/run
/nextcloud-php-fpm.sock:", host: "192.168.1.28"
2020/01/07 09:23:11 [warn] 4265#100570: *42027 an upstream response is buffered
to a temporary file /var/tmp/nginx/fastcgi_temp/9/85/0000001859 while reading up
stream, client: 192.168.1.82, server: _, request: "GET /remote.php/dav/files/ser
vtecnico2/compartidos/serviciotecnico/ARCHIVOS%20ST/1-David/4-Software/Precisa/P
repDATA.nrg HTTP/1.1", upstream: "fastcgi://unix:/var/run/nextcloud-php-fpm.sock
:", host: "192.168.1.28"
2020/01/07 09:23:43 [warn] 4267#100729: *43092 an upstream response is buffered
to a temporary file /var/tmp/nginx/fastcgi_temp/0/86/0000001860 while reading up
stream, client: 192.168.1.82, server: _, request: "GET /remote.php/dav/files/ser
vtecnico2/compartidos/serviciotecnico/ARCHIVOS%20ST/1-David/9-Fotos,%20Grabacion
es%20y%20Videos/Capacitaciones/Capacitacion%20Precisa/20130528_100300.mp4 HTTP/1
.1", upstream: "fastcgi://unix:/var/run/nextcloud-php-fpm.sock:", host: "192.168
.1.28"
2020/01/07 09:31:23 [warn] 4262#101575: *43267 an upstream response is buffered
to a temporary file /var/tmp/nginx/fastcgi_temp/1/86/0000001861 while reading up
stream, client: 192.168.1.82, server: _, request: "GET /remote.php/dav/files/ser
vtecnico2/compartidos/serviciotecnico/ARCHIVOS%20ST/1-David/9-Fotos,%20Grabacion
es%20y%20Videos/Capacitaciones/Capacitaci%C3%B3n%20Tuttnauer/20130613_152210.mp4
HTTP/1.1", upstream: "fastcgi://unix:/var/run/nextcloud-php-fpm.sock:", host: "
192.168.1.28"
2020/01/07 09:42:41 [error] 4264#101633: *43771 access forbidden by rule, client
: 192.168.1.98, server: _, request: "GET /data/.ocdata?t=1578408161666 HTTP/1.1"
, host: "192.168.1.28"
2020/01/07 09:55:38 [error] 4264#101633: *44015 upstream timed out (60: Operatio
n timed out) while reading response header from upstream, client: 192.168.1.98,
server: _, request: "GET /index.php/apps/logreader/poll?lastReqId=L2hV3t0j06ieIF
tj0SjK HTTP/1.1", upstream: "fastcgi://unix:/var/run/nextcloud-php-fpm.sock", ho
st: "192.168.1.28"
2020/01/07 09:55:45 [error] 4265#100570: *44020 upstream timed out (60: Operatio
n timed out) while reading response header from upstream, client: 192.168.1.98,
server: _, request: "GET /ocs/v2.php/apps/notifications/api/v2/notifications HTT
P/1.1", upstream: "fastcgi://unix:/var/run/nextcloud-php-fpm.sock", host: "192.1
68.1.28"
2020/01/07 09:57:40 [error] 4267#100729: *44085 upstream timed out (60: Operatio
n timed out) while reading response header from upstream, client: 192.168.1.83,
server: _, request: "GET /ocs/v2.php/apps/notifications/api/v2/notifications?for
mat=json HTTP/1.1", upstream: "fastcgi://unix:/var/run/nextcloud-php-fpm.sock",
host: "192.168.1.28"
2020/01/07 09:59:11 [error] 4267#100729: *44101 upstream timed out (60: Operatio
n timed out) while reading response header from upstream, client: 192.168.1.82,
server: _, request: "GET /ocs/v2.php/apps/notifications/api/v2/notifications?for
mat=json HTTP/1.1", upstream: "fastcgi://unix:/var/run/nextcloud-php-fpm.sock",
host: "192.168.1.28"
2020/01/07 10:02:40 [error] 4262#101575: *44134 upstream timed out (60: Operatio
n timed out) while reading response header from upstream, client: 192.168.1.83,
server: _, request: "GET /ocs/v2.php/apps/notifications/api/v2/notifications?for
mat=json HTTP/1.1", upstream: "fastcgi://unix:/var/run/nextcloud-php-fpm.sock",
host: "192.168.1.28"
2020/01/07 10:04:11 [error] 4262#101575: *44150 upstream timed out (60: Operatio
n timed out) while reading response header from upstream, client: 192.168.1.82,
server: _, request: "GET /ocs/v2.php/apps/notifications/api/v2/notifications?for
mat=json HTTP/1.1", upstream: "fastcgi://unix:/var/run/nextcloud-php-fpm.sock",
host: "192.168.1.28"
2020/01/07 10:06:15 [error] 4262#101575: *44171 upstream timed out (60: Operatio
n timed out) while reading response header from upstream, client: 192.168.1.98,
server: _, request: "GET /index.php/csrftoken HTTP/1.1", upstream: "fastcgi://un
ix:/var/run/nextcloud-php-fpm.sock", host: "192.168.1.28"