Hallo und guten Abend,
vorweg: Ich bin Neuling in Sachen OwnCloud/NextCloud/Unix
Habe eine VM mit Ubuntu Server 16.04.1 LTS 64-bit, Apache 2.4, MySQL 5.7, PHP 7 am laufen,
Bis jetzt lief auch alles wunderbar bis ich Apps heute morgen installiert hatte. Welche genau kann ich jetzt leider gar nicht mehr sagen 
Danach erhalte ich nur noch einen Blank Screen (vermutlich internaler Server Error).
Der Windows Client und die Android App funktionieren nach wie vor.
Hier schon mal meine Config und Apache Error log.
Kann leider nicht erkennen wo der Fehler liegt: client denied by server configuration: ???
/var/www/nextcloud/config/config.php
<?php
$CONFIG = array (
'passwordsalt' => '………………………..',
'secret' => '……………………………………..',
'trusted_domains' =>
array (
0 => 'localhost',
1 => '192.168.178.80',
2 => 'pc-stagge.selfhost.it',
),
'datadirectory' => '/var/ncdata',
'overwrite.cli.url' => 'https://192.168.178.80/',
'dbtype' => 'mysql',
'version' => '9.0.53.0',
'dbname' => 'nextcloud_db',
'dbhost' => 'localhost',
'dbtableprefix' => 'oc_',
'dbuser' => 'oc_ncadmin',
'dbpassword' => 'Smhh8LRARYZBycmr6lu9HkoRxdfCI7',
'logtimezone' => 'UTC',
'installed' => true,
'instanceid' => 'ocr6ct4odsi8',
'appstore.experimental.enabled' => 'true',
'mail_smtpmode' => 'smtp',
'mail_smtpauth' => '1',
'mail_smtpport' => '465',
'mail_smtphost' => 'smtp.gmail.com',
'mail_smtpauthtype' => 'LOGIN',
'mail_from_address' => 'www.techandme.se',
'mail_domain' => 'gmail.com',
'mail_smtpsecure' => 'ssl',
'mail_smtpname' => 'www.techandme.se@gmail.com',
'mail_smtppassword' => 'vinr vhpa jvbh hovy',
'memcache.local' => '\OC\Memcache\Redis',
'filelocking.enabled' => true,
'memcache.distributed' => '\OC\Memcache\Redis',
'memcache.locking' => '\OC\Memcache\Redis',
'redis' =>
array (
'host' => '/var/run/redis/redis.sock',
'port' => 0,
'timeout' => 0,
'dbindex' => 0,
),
'maintenance' => false,
);
cat /var/log/apache2/error.log:
[Wed Aug 17 21:33:20.286108 2016] [authz_core:error] [pid 2599] [client 192.168.178.192:50275] AH01630: client denied by server configuration: /usr/share/phpmyadmin, referer: http://192.168.178.80/
[Wed Aug 17 21:33:59.435821 2016] [authz_core:error] [pid 2599] [client 192.168.178.192:50297] AH01630: client denied by server configuration: /usr/share/phpmyadmin, referer: http://192.168.178.80/
[Wed Aug 17 21:34:14.624668 2016] [authz_core:error] [pid 2595] [client 192.168.178.192:50315] AH01630: client denied by server configuration: /usr/share/phpmyadmin
[Wed Aug 17 22:22:37.688465 2016] [mpm_prefork:notice] [pid 2577] AH00169: caught SIGTERM, shutting down
[Wed Aug 17 22:23:46.917336 2016] [mpm_prefork:notice] [pid 2586] AH00163: Apache/2.4.18 (Ubuntu) OpenSSL/1.0.2g-fips configured -- resuming normal operations
[Wed Aug 17 22:23:46.919303 2016] [core:notice] [pid 2586] AH00094: Command line: '/usr/sbin/apache2'