Apache2 reports error on each start/restart
Nextcloud version 17.0:
Raspbian
Apache 2.4.38
PHP version 7.3.9
The issue I’m are facing:
Hey guys, I got a all new setup on my raspberry pi 4. Everything is working fine so far, but each time I start or restart the apache2 service I get the error below.
I found a lot of simular topic, but nothing that let me solve my problem. I think it is maybe something a cronjob or certbot did while renewing the certificate from let’s encrypt. The job is long removed now but the error is still showing up.
Reason to post here is, that the NextcloudApp is running well, eben the webdav, but it is not possible to reach the site from a browser or like google page speed. There you will just get an error. The DynDNS is working well, because SSH over DNS is working from outside…
Is there more information i should provide? Thank you a lot for all suggestions and help! 
The output of my config.php
<?php
$CONFIG = array (
'instanceid' => 'xxxxxxxxxxxxxx',
'passwordsalt' => 'xxxxxxxxxxxxxxxxxxx',
'secret' => 'xxxxxxxxxxxxxxxxx',
'trusted_domains' =>
array (
0 => 'xxx.xxx.xxx.xx',
1 => 'www.xxx.de',
2 => 'xxx.de',
),
'datadirectory' => '/xxxxx/xxxxxx/data',
'dbtype' => 'mysql',
'version' => '17.0.0.9',
'overwrite.cli.url' => 'http://xx.xx.xx.xx/nextcloud',
'dbname' => 'nextcloud',
'dbhost' => 'localhost',
'dbport' => '',
'dbtableprefix' => 'oc_',
'mysql.utf8mb4' => true,
'dbuser' => 'xxxxx',
'dbpassword' => 'xxxxx',
'installed' => true,
'maintenance' => false,
'memcache.local' => '\\OC\\Memcache\\APCu',
'tempdirectory' => '/xxxx/xxxx/nextcloudtemp',
'enable_previews' => false,
);
Apache2 error.log
[Fri Oct 18 21:13:40.967543 2019] [mpm_prefork:notice] [pid 576] AH00169: caught SIGTERM, shutting down
[Fri Oct 18 21:13:41.270133 2019] [mpm_prefork:notice] [pid 2521] AH00163: Apache/2.4.38 (Raspbian) OpenSSL/1.1.1d configured -- resuming normal operations
[Fri Oct 18 21:13:41.270308 2019] [core:notice] [pid 2521] AH00094: Command line: '/usr/sbin/apache2'
On sites-available i have the following files:
000-default.conf 000-default.conf-bak 000-default-le-ssl.conf 000-default-le-ssl.conf-bak default-ssl.conf le-redirect-www.xxxxx.de.conf nextcloud.conf xxxxxx.de.conf www.xxxxxxx.de.conf