(solved ?) Windows desktop client unable to sync. Android works fine Version 12 Beta 4

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Nextcloud version 12.0 beta 4:
Operating system and version Ubuntu 16.04:
Apache or nginx version _ Apache 2.4.18:
PHP version PHP 7.0.15:
Is this the first time you’ve seen this error?: Has never worked properly since installing the client with this server

Can you reliably replicate it? (If so, please outline steps): yes. Open the client and Force Sync.

The issue you are facing:
The desktop client will not sync properly. Android app works fine. Gives errors like “operation Canceled” and “info - server replied: Service Unavailable”

Occasionally it will sync properly. I can access all the files through android or web interface.

The output of your Nextcloud log in Admin > Logging:

Sabre\DAV\Exception\ServiceUnavailable: HTTP/1.1 503 Could not open file

/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/CorePlugin.php - line 85: OCA\DAV\Connector\Sabre\File->get()
[internal function] Sabre\DAV\CorePlugin->httpGet(Object(Sabre\HTTP\Request), Object(Sabre\HTTP\Response))
/var/www/nextcloud/3rdparty/sabre/event/lib/EventEmitterTrait.php - line 105: call_user_func_array(Array, Array)
/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php - line 479: Sabre\Event\EventEmitter->emit(‘method GET’, Array)
/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php - line 254: Sabre\DAV\Server->invokeMethod(Object(Sabre\HTTP\Request), Object(Sabre\HTTP\Response))
/var/www/nextcloud/apps/dav/lib/Server.php - line 245: Sabre\DAV\Server->exec()
/var/www/nextcloud/apps/dav/appinfo/v2/remote.php - line 33: OCA\DAV\Server->exec()
/var/www/nextcloud/remote.php - line 162: require_once(’/var/www/nextcl…’)

PHP fopen(/mnt/md0/3tb_share/next_cloud/prcdslnc13/files/NextCLoud config info.txt): failed to open stream: No such file or directory at /var/www/nextcloud/lib/private/Files/Storage/Local.php#277 2017-05-18T17:00:26-0500
Error PHP fopen(/mnt/md0/3tb_share/next_cloud/prcdslnc13/files/Nextcloud.mp4): failed to open stream: No such file or directory at /var/www/nextcloud/lib/private/Files/Storage/Local.php#277 2017-05-18T17:00:26-0500
Error PHP fopen(/mnt/md0/3tb_share/next_cloud/prcdslnc13/files/Nextcloud Manual.pdf): failed to open stream: No such file or directory at /var/www/nextcloud/lib/private/Files/Storage/Local.php#277 2017-05-18T17:00:26-0500

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

<?php $CONFIG = array ( 'instanceid' => 'oczbfmkwajkt', 'passwordsalt' => , 'secret' => , 'trusted_domains' => array ( 0 => ', ), 'datadirectory' => '/mnt/md0/3tb_share/next_cloud', 'overwrite.cli.url' => ', 'dbtype' => 'mysql', 'version' => '', 'dbname' => '', 'dbhost' => 'localhost', 'dbport' => '', 'dbtableprefix' => 'oc_', 'dbuser' => '', 'dbpassword' => ', 'logtimezone' => 'UTC', 'installed' => true, 'maintenance' => false, 'loglevel' => 2, 'updater.release.channel' => 'beta', 'theme' => '', 'updater.secret' =>, ); The output of your Apache/nginx/system log in `/var/log/____`: --- Remember, this information may be requested if it isn't supplied; for fastest response please provide as much as you can :heart: Feel free to use a pastebin service, otherwise log files can be indented with 4 spaces on each line to present them in a friendlier way on the forum.

From what I can tell i had files that were corrupt in the directories. When I tried to access the files from the web interface I got errors as well. Deleted those, uploaded new files to test, things seem to be working now.