Hi from germany,
i was running Nextcloud 11.0.0.10 without any problems at my shared hosting server (pretty strong server). Now NC showed me that there is an update available, so i decided to do a manual install. After finishing the upload of all new files (deleted all, just saved data and config dir) NC told me, it wants to update, so i said okay. After a few seconds i get the error “There was an error” with no further informations. I have no idea what to do now, can you help me?
Nextcloud versio: 11.0.0.10
Operating system and version : Debian 3.2.84-1 x86_64
Apache or nginx version : Apache (could’nt find the version in the php.ini, looks like 2.x)
PHP version : 5.6.30
Is this the first time you’ve seen this error?: Yes
Can you reliably replicate it? (If so, please outline steps): Yes, just turn off maintenance, start the update and boom 
The issue you are facing: The Update process
The output of your Nextcloud log in Admin > Logging: Can’t access Nextcloud, so i have no log
The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):
<?php
$CONFIG = array (
‘instanceid’ => ‘oc3ncqx0qzjw’,
‘passwordsalt’ => ‘xxx’,
‘secret’ => ‘xxx’,
‘trusted_domains’ =>
array (
0 => ‘www.data-industries.de’,
),
‘datadirectory’ => ‘/var/www/vhosts/pce-cdn.de/data-industries/data’,
‘overwrite.cli.url’ => ‘https://www.data-industries.de’,
‘dbtype’ => ‘mysql’,
‘version’ => ‘11.0.0.10’,
‘dbname’ => ‘xxx’,
‘dbhost’ => ‘xxx’,
‘dbport’ => ‘’,
‘dbtableprefix’ => ‘oc_’,
‘dbuser’ => ‘xxx’,
‘dbpassword’ => ‘xxx’,
‘logtimezone’ => ‘UTC’,
‘installed’ => true,
‘updater.secret’ => ‘xxx’,
‘maintenance’ => false,
‘theme’ => ‘’,
‘loglevel’ => 0,
);
The output of your Apache/nginx/system log in /var/log/____: No access
Additional informations:
memory_limit: 256M
max_execution_time: 30 (Standard)
max_input_time: 60 (Standard)
post_max_size: 8M (Standard)
upload_max_filesize: 2M (Standard)
opcache.enable: on (Standard)
Greetings, Christian