Collabora Connection refused when opening or creating Document

Recently Collabora started to Refuse working.
I configured nginx like recommended with a seperate subdomain.
The Collabora is running in Docker on the same machine like nextcloud, and it always kind of worked out of the box with that…

Im getting no errors in Nextcloud log and it says that Collabora is reachable.
But when creating a Document the Container Log of Collabora says the following:

frk-00038-00038 2021-01-31 10:33:54.684091 [ forkit ] ERR Failed to unmount [/opt/lool/child-roots/M20ZJJb6Bs5uYOjd].| common/JailUtil.cpp:68

frk-00038-00038 2021-01-31 10:34:56.839294 [ forkit ] ERR Failed to get the realpath of [/etc/timezone] (ENOENT: No such file or directory)| common/FileUtil.cpp:256

frk-00038-00038 2021-01-31 10:34:56.839347 [ forkit ] ERR Failed to get the realpath of [/etc/localtime] (ENOENT: No such file or directory)| common/FileUtil.cpp:256

kit-00060-00038 2021-01-31 10:34:57.036494 [ kit_spare_003 ] ERR Failed to get the realpath of [/etc/timezone] (ENOENT: No such file or directory)| common/FileUtil.cpp:256

kit-00060-00038 2021-01-31 10:34:57.036552 [ kit_spare_003 ] ERR Failed to get the realpath of [/etc/localtime] (ENOENT: No such file or directory)| common/FileUtil.cpp:256

kit-00060-00038 2021-01-31 10:34:57.036494 [ kit_spare_003 ] ERR Failed to get the realpath of [/etc/timezone] (ENOENT: No such file or directory)| common/FileUtil.cpp:256

kit-00060-00038 2021-01-31 10:34:57.036552 [ kit_spare_003 ] ERR Failed to get the realpath of [/etc/localtime] (ENOENT: No such file or directory)| common/FileUtil.cpp:256

sh: 1: /usr/bin/loolmount: Operation not permitted
frk-00038-00038 2021-01-31 10:34:57.861675 [ forkit ] ERR Failed to unmount [/opt/lool/child-roots/GytASHJjxjOei7Mr/tmp].| common/JailUtil.cpp:68

sh: 1: /usr/bin/loolmount: Operation not permitted
frk-00038-00038 2021-01-31 10:34:57.873535 [ forkit ] ERR Failed to unmount [/opt/lool/child-roots/GytASHJjxjOei7Mr/lo].| common/JailUtil.cpp:68

sh: 1: /usr/bin/loolmount: Operation not permitted
frk-00038-00038 2021-01-31 10:34:57.885213 [ forkit ] ERR Failed to unmount [/opt/lool/child-roots/GytASHJjxjOei7Mr].| common/JailUtil.cpp:68

Does anybody have a idea what could be the Problem?

After trying literally everythin, i found out that it was a CSP fault. Uff. :confused: