Federation Cloud works only one way

ℹ️ Support
,
1

Hello,

we have 2 univention servers in a network. We wanted to connect these servers to Federation Cloud. Unfortunately, this only works from one server. What can we do?
The second server gets no request.

Here is the Log:
{“reqId”:“fdDhnzxuPUaopxEGaWYt”,“level”:3,“time”:“2018-07-27T13:20:51+02:00”,“remoteAddr”:“123.214.51.171”,“user”:“maia”,“app”:“no app in context”,“method”:“POST”,“url”:"/nextcloud/ocs/v2.php/apps/files_sharing/api/v1/shares?format=json",“message”:“Failed to send share by email: Address in mailbox given [paas maier Archiv@localhost.localdomain] does not comply with RFC 2822, 3.6.2.”,“userAgent”:“Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:61.0) Gecko/20100101 Firefox/61.0”,“version”:“13.0.4.0”}

2

Hier is another log:
“:“Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36”,“version”:“13.0.4.0”}
{“reqId”:“HhuFayK8ktQTRNMmlcDA”,“level”:3,“time”:“2018-08-03T15:23:09+02:00”,“remoteAddr”:“81.126.47.168”,“user”:“pgp”,“app”:“OC_USER_SQL”,“method”:“GET”,“url”:”/nextcloud/index.php/settings/apps/list?category=installed",“message”:“Failed to connect to the database: Unsupported type: “,“userAgent”:“Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36”,“version”:“13.0.4.0”}
{“reqId”:“HhuFayK8ktQTRNMmlcDA”,“level”:3,“time”:“2018-08-03T15:23:09+02:00”,“remoteAddr”:“81.126.47.168”,“user”:“pgp”,“app”:“OC_USER_SQL”,“method”:“GET”,“url”:”/nextcloud/index.php/settings/apps/list?category=installed”,“message”:“Failed to connect to the database: Unsupported type: “,“userAgent”:“Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36”,“version”:“13.0.4.0”}
{“reqId”:“wxLvjaDy7gAr6owbnz6d”,“level”:3,“time”:“2018-08-03T15:23:09+02:00”,“remoteAddr”:“81.126.47.168”,“user”:“pgp”,“app”:“OC_USER_SQL”,“method”:“GET”,“url”:”/nextcloud/index.php/settings/apps/categories”,“message”:“Failed to connect to the database: Unsupported type: “,“userAgent”:“Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36”,“version”:“13.0.4.0”}
{“reqId”:“wxLvjaDy7gAr6owbnz6d”,“level”:3,“time”:“2018-08-03T15:23:09+02:00”,“remoteAddr”:“81.126.47.168”,“user”:“pgp”,“app”:“OC_USER_SQL”,“method”:“GET”,“url”:”/nextcloud/index.php/settings/apps/categories”,“message”:“Failed to connect to the database: Unsupported type: “,“userAgent”:“Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36”,“version”:“13.0.4.0”}
{“reqId”:“CNHxAtI8GRwIjl6pDfPj”,“level”:3,“time”:“2018-08-03T15:23:10+02:00”,“remoteAddr”:“81.126.47.168”,“user”:“pgp”,“app”:“OC_USER_SQL”,“method”:“GET”,“url”:”/nextcloud/index.php/settings/apps/list?category=updates”,“message”:“Failed to connect to the database: Unsupported type: “,“userAgent”:“Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36”,“version”:“13.0.4.0”}
{“reqId”:“CNHxAtI8GRwIjl6pDfPj”,“level”:3,“time”:“2018-08-03T15:23:10+02:00”,“remoteAddr”:“81.126.47.168”,“user”:“pgp”,“app”:“OC_USER_SQL”,“method”:“GET”,“url”:”/nextcloud/index.php/settings/apps/list?category=updates”,“message”:“Failed to connect to the database: Unsupported type: “,“userAgent”:“Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36”,“version”:“13.0.4.0”}
{“reqId”:“wSTufIzi2q1xtSHBr38H”,“level”:3,“time”:“2018-08-03T15:23:14+02:00”,“remoteAddr”:“81.126.47.168”,“user”:“pgp”,“app”:“OC_USER_SQL”,“method”:“GET”,“url”:”/nextcloud/index.php/core/search?query=sql&inApps%5B%5D=settings&page=1&size=30”,“message”:“Failed to connect to the database: Unsupported type: “,“userAgent”:“Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36”,“version”:“13.0.4.0”}
{“reqId”:“wSTufIzi2q1xtSHBr38H”,“level”:3,“time”:“2018-08-03T15:23:14+02:00”,“remoteAddr”:“81.126.47.168”,“user”:“pgp”,“app”:“OC_USER_SQL”,“method”:“GET”,“url”:”/nextcloud/index.php/core/search?query=sql&inApps%5B%5D=settings&page=1&size=30”,“message”:“Failed to connect to the database: Unsupported type: “,“userAgent”:“Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36”,“version”:“13.0.4.0”}
{“reqId”:“nghS07qdXvlyPmLkgDZS”,“level”:3,“time”:“2018-08-03T15:23:15+02:00”,“remoteAddr”:“81.126.47.168”,“user”:“pgp”,“app”:“OC_USER_SQL”,“method”:“POST”,“url”:”/nextcloud/index.php/settings/ajax/disableapp.php”,“message”:“Failed to connect to the database: Unsupported type: “,“userAgent”:“Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36”,“version”:“13.0.4.0”}
{“reqId”:“nghS07qdXvlyPmLkgDZS”,“level”:3,“time”:“2018-08-03T15:23:15+02:00”,“remoteAddr”:“81.126.47.168”,“user”:“pgp”,“app”:“OC_USER_SQL”,“method”:“POST”,“url”:”/nextcloud/index.php/settings/ajax/disableapp.php”,“message”:"Failed to connect to the database: Unsupported type: ",“userAgent”:“Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36”,“version”:“13.0.4.0”}