<?php
$CONFIG = array (
'instanceid' => '',
'passwordsalt' => '',
'secret' => '',
'trusted_domains' =>
array (
0 => '192.168.56.2:8089',
1 => '',
2 => '',
),
'datadirectory' => '/var/www/nextcloud/data',
'dbtype' => 'mysql',
'version' => '18.0.1.0',
'overwrite.cli.url' => 'https://192.168.56.2:8089',
'dbname' => 'nextcloud',
'dbhost' => 'localhost',
'dbport' => '',
'dbtableprefix' => 'oc_',
'mysql.utf8mb4' => true,
'dbuser' => '',
'dbpassword' => '',
'installed' => true,
'htaccess.RewriteBase' => '/',
'session_lifetime' => 86400,
'session_keepalive' => true,
'filesystem_check_changes' => 1,
'memcache.local' => '\\OC\\Memcache\\Redis',
'redis' =>
array (
'host' => 'localhost',
'port' => 6379,
),
'memcache.locking' => '\\OC\\Memcache\\Redis',
'maintenance' => false,
'mail_smtpmode' => 'smtp',
'mail_smtpsecure' => 'ssl',
'mail_sendmailmode' => 'smtp',
'mail_from_address' => '',
'mail_domain' => '',
'mail_smtpauthtype' => 'LOGIN',
'mail_smtpauth' => 1,
'mail_smtpport' => '465',
'mail_smtpname' => '',
'mail_smtppassword' => '',
'mail_smtphost' => '',
'theme' => '',
'loglevel' => 2,
'updater.release.channel' => 'beta',
);
Steps to reproduce
Expected behaviour
The picture loads normally after clicking the picture.
Actual behaviour
The picture can't be successfully loaded and the progress bar just keeps rotating.

Server configuration
Operating system: Ubuntu 18.04LTS
Web server: Apache 2.4.29
Database: MariaDB 10.1.44
PHP version: PHP 7.2.24
Nextcloud version: 18.0.1 RC1
Updated from an older Nextcloud/ownCloud or fresh install: Updated from NC17 stable
Where did you install Nextcloud from: Zip package from nextcloud website
Signing status:
Signing status
List of activated apps:
App list
Nextcloud configuration:
Config report
Are you using external storage, if yes which one: no
Are you using encryption: no
Are you using an external user-backend, if yes which one: no
Client configuration
Browser: Chrome 80 / Firefox 72
Operating system: Windows 10 1909
Logs
No related error log