Libreoffice Online - can't open documents on mobile

Hi, i have Libreoffice Online running as Docker Container, while Nextcloud is installed normally on the Webserver.

I can open documents on my PC within the browser. On my phone, I can’t open them. Libreoffice online gets loaded but opening Excelfiles result in a grey background with a menu icon that cant be pressed. Word documents crash after libreoffice got loaded.
I got some error messages in the container logs, but the same messages I get when I successfully open a document.

2022-05-25 06:58:16,stdout,e[1me[31mfrk-00025-00025 2022-05-25 06:58:16.044715 [ forkit ] ERR  Failed to unmount [/opt/lool/child-roots/jG23XWZYs5nFWwAZ].| common/JailUtil.cpp:70e[0m

2022-05-25 06:58:16,stdout,sh: 1: /usr/bin/loolmount: Operation not permitted

2022-05-25 06:58:16,stdout,e[1me[31mfrk-00025-00025 2022-05-25 06:58:16.032924 [ forkit ] ERR  Failed to unmount [/opt/lool/child-roots/jG23XWZYs5nFWwAZ/lo].| common/JailUtil.cpp:70e[0m

2022-05-25 06:58:16,stdout,sh: 1: /usr/bin/loolmount: Operation not permitted

2022-05-25 06:58:16,stdout,e[1me[31mfrk-00025-00025 2022-05-25 06:58:16.020438 [ forkit ] ERR  Failed to unmount [/opt/lool/child-roots/jG23XWZYs5nFWwAZ/tmp].| common/JailUtil.cpp:70e[0m

2022-05-25 06:58:16,stdout,sh: 1: /usr/bin/loolmount: Operation not permitted

2022-05-25 06:58:04,stdout,"e[1me[31mkit-00113-00025 2022-05-25 06:58:04.700278 [ kit_spare_007 ] ERR  LibreOfficeKit seccomp security lockdown failed, but configured to continue. You are running in a significantly less secure mode.| kit/Kit.cpp:2303e[0m
"
2022-05-25 06:58:04,stdout,e[1me[31mkit-00113-00025 2022-05-25 06:58:04.700180 [ kit_spare_007 ] ERR  Failed to install seccomp syscall filter| common/Seccomp.cpp:237e[0m

2022-05-25 06:58:04,stdout,e[1me[31mkit-00113-00025 2022-05-25 06:58:04.597380 [ kit_spare_007 ] ERR  Security warning - using template /opt/libreoffice as install subpath - skipping chroot jail setup| kit/Kit.cpp:2259e[0m

2022-05-25 06:58:04,stdout,e[35mwsd-00007-00029 2022-05-25 06:58:04.539319 [ websrv_poll ] WRN  FileServerRequestHandler: File not found: Invalid URI request: [/loleaflet/215a76e21/branding-mobile.css].| wsd/FileServer.cpp:489e[0m

2022-05-25 06:58:04,stdout,e[35mwsd-00007-00029 2022-05-25 06:58:04.517097 [ websrv_poll ] WRN  FileServerRequestHandler: File not found: Invalid URI request: [/loleaflet/215a76e21/branding.js].| wsd/FileServer.cpp:489e[0m

2022-05-25 06:58:04,stdout,e[35mwsd-00007-00029 2022-05-25 06:58:04.492393 [ websrv_poll ] WRN  FileServerRequestHandler: File not found: Invalid URI request: [/loleaflet/215a76e21/branding.css].| wsd/FileServer.cpp:489e[0m

2022-05-25 06:57:33,stdout,e[1me[31mfrk-00025-00025 2022-05-25 06:57:33.054631 [ forkit ] ERR  Failed to unmount [/opt/lool/child-roots/yGd5Wt6De1fGe6B3].| common/JailUtil.cpp:70e[0m

2022-05-25 06:57:33,stdout,sh: 1: /usr/bin/loolmount: Operation not permitted

2022-05-25 06:57:33,stdout,e[1me[31mfrk-00025-00025 2022-05-25 06:57:33.040553 [ forkit ] ERR  Failed to unmount [/opt/lool/child-roots/yGd5Wt6De1fGe6B3/lo].| common/JailUtil.cpp:70e[0m

2022-05-25 06:57:33,stdout,sh: 1: /usr/bin/loolmount: Operation not permitted

2022-05-25 06:57:33,stdout,e[1me[31mfrk-00025-00025 2022-05-25 06:57:33.026484 [ forkit ] ERR  Failed to unmount [/opt/lool/child-roots/yGd5Wt6De1fGe6B3/tmp].| common/JailUtil.cpp:70e[0m

2022-05-25 06:57:33,stdout,sh: 1: /usr/bin/loolmount: Operation not permitted

2022-05-25 06:57:26,stdout,e[35mwsd-00007-00095 2022-05-25 06:57:26.867987 [ docbroker_005 ] WRN  Tracker tileID 0:0:7680:3840:3840:0 was dropped because of time out (616205 ms). Tileprocessed message did not arrive in time.| wsd/ClientSession.cpp:1626e[0m

2022-05-25 06:57:26,stdout,e[35mwsd-00007-00095 2022-05-25 06:57:26.867964 [ docbroker_005 ] WRN  Tracker tileID 0:0:11520:3840:3840:0 was dropped because of time out (616206 ms). Tileprocessed message did not arrive in time.| wsd/ClientSession.cpp:1626e[0m

2022-05-25 06:57:26,stdout,e[35mwsd-00007-00095 2022-05-25 06:57:26.867940 [ docbroker_005 ] WRN  Tracker tileID 0:3840:7680:3840:3840:0 was dropped because of time out (616206 ms). Tileprocessed message did not arrive in time.| wsd/ClientSession.cpp:1626e[0m

2022-05-25 06:57:26,stdout,e[35mwsd-00007-00095 2022-05-25 06:57:26.867911 [ docbroker_005 ] WRN  Tracker tileID 0:7680:7680:3840:3840:0 was dropped because of time out (616206 ms). Tileprocessed message did not arrive in time.| wsd/ClientSession.cpp:1626e[0m

2022-05-25 06:57:26,stdout,e[35mwsd-00007-00095 2022-05-25 06:57:26.867883 [ docbroker_005 ] WRN  Tracker tileID 0:0:3840:3840:3840:0 was dropped because of time out (616362 ms). Tileprocessed message did not arrive in time.| wsd/ClientSession.cpp:1626e[0m

2022-05-25 06:57:26,stdout,e[35mwsd-00007-00095 2022-05-25 06:57:26.867855 [ docbroker_005 ] WRN  Tracker tileID 0:3840:3840:3840:3840:0 was dropped because of time out (616362 ms). Tileprocessed message did not arrive in time.| wsd/ClientSession.cpp:1626e[0m

2022-05-25 06:57:26,stdout,e[35mwsd-00007-00095 2022-05-25 06:57:26.867819 [ docbroker_005 ] WRN  Tracker tileID 0:7680:0:3840:3840:0 was dropped because of time out (616362 ms). Tileprocessed message did not arrive in time.| wsd/ClientSession.cpp:1626e[0m

2022-05-25 06:57:26,stdout,e[35mwsd-00007-00095 2022-05-25 06:57:26.867790 [ docbroker_005 ] WRN  Tracker tileID 0:7680:3840:3840:3840:0 was dropped because of time out (616362 ms). Tileprocessed message did not arrive in time.| wsd/ClientSession.cpp:1626e[0m

2022-05-25 06:57:26,stdout,e[35mwsd-00007-00095 2022-05-25 06:57:26.867678 [ docbroker_005 ] WRN  Tracker tileID 0:3840:0:3840:3840:0 was dropped because of time out (616362 ms). Tileprocessed message did not arrive in time.| wsd/ClientSession.cpp:1626e[0m

2022-05-25 06:46:29,stdout,e[1me[31mkit-00082-00103 2022-05-25 06:46:29.385708 [ thread-pool ] ERR  #16 Invoked from foreign thread. Expected: 0x7f5a25fb9bc0 but called from 140024233993984 (103).| ./net/Socket.hpp:307e[0m

2022-05-25 06:46:29,stdout,e[1me[31mkit-00082-00103 2022-05-25 06:46:29.385680 [ thread-pool ] ERR  #16 Invoked from foreign thread. Expected: 0x7f5a25fb9bc0 but called from 140024233993984 (103).| ./net/Socket.hpp:307e[0m

2022-05-25 06:46:29,stdout,e[1me[31mkit-00082-00103 2022-05-25 06:46:29.385615 [ thread-pool ] ERR  #16 Invoked from foreign thread. Expected: 0x7f5a25fb9bc0 but called from 140024233993984 (103).| ./net/Socket.hpp:307e[0m

2022-05-25 06:46:29,stdout,e[1me[31mkit-00082-00103 2022-05-25 06:46:29.385020 [ thread-pool ] ERR  #16 Invoked from foreign thread. Expected: 0x7f5a25fb9bc0 but called from 140024233993984 (103).| ./net/Socket.hpp:307e[0m

2022-05-25 06:46:29,stdout,e[1me[31mkit-00082-00103 2022-05-25 06:46:29.384968 [ thread-pool ] ERR  #16 Invoked from foreign thread. Expected: 0x7f5a25fb9bc0 but called from 140024233993984 (103).| ./net/Socket.hpp:307e[0m

2022-05-25 06:46:29,stdout,e[1me[31mkit-00082-00103 2022-05-25 06:46:29.384868 [ thread-pool ] ERR  #16 Invoked from foreign thread. Expected: 0x7f5a25fb9bc0 but called from 140024233993984 (103).| ./net/Socket.hpp:307e[0m

2022-05-25 06:46:29,stdout,e[1me[31mkit-00082-00103 2022-05-25 06:46:29.383017 [ thread-pool ] ERR  #16 Invoked from foreign thread. Expected: 0x7f5a25fb9bc0 but called from 140024233993984 (103).| ./net/Socket.hpp:307e[0m

2022-05-25 06:46:29,stdout,e[1me[31mkit-00082-00103 2022-05-25 06:46:29.382980 [ thread-pool ] ERR  #16 Invoked from foreign thread. Expected: 0x7f5a25fb9bc0 but called from 140024233993984 (103).| ./net/Socket.hpp:307e[0m

2022-05-25 06:46:29,stdout,e[1me[31mkit-00082-00103 2022-05-25 06:46:29.382887 [ thread-pool ] ERR  #16 Invoked from foreign thread. Expected: 0x7f5a25fb9bc0 but called from 140024233993984 (103).| ./net/Socket.hpp:307e[0m

2022-05-25 06:46:27,stdout,"e[1me[31mkit-00096-00025 2022-05-25 06:46:27.067251 [ kit_spare_006 ] ERR  LibreOfficeKit seccomp security lockdown failed, but configured to continue. You are running in a significantly less secure mode.| kit/Kit.cpp:2303e[0m
"
2022-05-25 06:46:27,stdout,e[1me[31mkit-00096-00025 2022-05-25 06:46:27.063793 [ kit_spare_006 ] ERR  Failed to install seccomp syscall filter| common/Seccomp.cpp:237e[0m

2022-05-25 06:46:26,stdout,e[1me[31mkit-00096-00025 2022-05-25 06:46:26.956284 [ kit_spare_006 ] ERR  Security warning - using template /opt/libreoffice as install subpath - skipping chroot jail setup| kit/Kit.cpp:2259e[0m

2022-05-25 06:46:26,stdout,e[35mwsd-00007-00029 2022-05-25 06:46:26.863983 [ websrv_poll ] WRN  FileServerRequestHandler: File not found: Invalid URI request: [/loleaflet/215a76e21/branding-mobile.css].| wsd/FileServer.cpp:489e[0m

2022-05-25 06:46:26,stdout,e[35mwsd-00007-00029 2022-05-25 06:46:26.727284 [ websrv_poll ] WRN  FileServerRequestHandler: File not found: Invalid URI request: [/loleaflet/215a76e21/branding.js].| wsd/FileServer.cpp:489e[0m

2022-05-25 06:46:26,stdout,e[35mwsd-00007-00029 2022-05-25 06:46:26.718671 [ websrv_poll ] WRN  FileServerRequestHandler: File not found: Invalid URI request: [/loleaflet/215a76e21/branding.css].| wsd/FileServer.cpp:489e[0m

2022-05-25 06:40:25,stdout,e[1me[31mfrk-00025-00025 2022-05-25 06:40:25.586339 [ forkit ] ERR  Failed to unmount [/opt/lool/child-roots/0ruQ9ZCehvW5BwAw].| common/JailUtil.cpp:70e[0m

2022-05-25 06:40:25,stdout,sh: 1: /usr/bin/loolmount: Operation not permitted

2022-05-25 06:40:25,stdout,e[1me[31mfrk-00025-00025 2022-05-25 06:40:25.571043 [ forkit ] ERR  Failed to unmount [/opt/lool/child-roots/0ruQ9ZCehvW5BwAw/lo].| common/JailUtil.cpp:70e[0m

2022-05-25 06:40:25,stdout,sh: 1: /usr/bin/loolmount: Operation not permitted

2022-05-25 06:40:25,stdout,e[1me[31mfrk-00025-00025 2022-05-25 06:40:25.555007 [ forkit ] ERR  Failed to unmount [/opt/lool/child-roots/0ruQ9ZCehvW5BwAw/tmp].| common/JailUtil.cpp:70e[0m

2022-05-25 06:40:25,stdout,sh: 1: /usr/bin/loolmount: Operation not permitted

2022-05-25 06:40:12,stdout,"e[1me[31mkit-00082-00025 2022-05-25 06:40:12.678441 [ kit_spare_005 ] ERR  LibreOfficeKit seccomp security lockdown failed, but configured to continue. You are running in a significantly less secure mode.| kit/Kit.cpp:2303e[0m
"
2022-05-25 06:40:12,stdout,e[1me[31mkit-00082-00025 2022-05-25 06:40:12.678365 [ kit_spare_005 ] ERR  Failed to install seccomp syscall filter| common/Seccomp.cpp:237e[0m

2022-05-25 06:40:12,stdout,e[1me[31mkit-00082-00025 2022-05-25 06:40:12.527735 [ kit_spare_005 ] ERR  Security warning - using template /opt/libreoffice as install subpath - skipping chroot jail setup| kit/Kit.cpp:2259e[0m

2022-05-25 06:40:12,stdout,e[35mwsd-00007-00029 2022-05-25 06:40:12.450345 [ websrv_poll ] WRN  FileServerRequestHandler: File not found: Invalid URI request: [/loleaflet/215a76e21/branding-mobile.css].| wsd/FileServer.cpp:489e[0m

2022-05-25 06:40:12,stdout,e[35mwsd-00007-00029 2022-05-25 06:40:12.430047 [ websrv_poll ] WRN  FileServerRequestHandler: File not found: Invalid URI request: [/loleaflet/215a76e21/branding.js].| wsd/FileServer.cpp:489e[0m

2022-05-25 06:40:12,stdout,e[35mwsd-00007-00029 2022-05-25 06:40:12.410296 [ websrv_poll ] WRN  FileServerRequestHandler: File not found: Invalid URI request: [/loleaflet/215a76e21/branding.css].| wsd/FileServer.cpp:489e[0m

2022-05-25 06:39:58,stdout,e[1me[31mfrk-00025-00025 2022-05-25 06:39:58.957223 [ forkit ] ERR  Failed to unmount [/opt/lool/child-roots/BbrolKRHzRkiU4iR].| common/JailUtil.cpp:70e[0m

2022-05-25 06:39:58,stdout,sh: 1: /usr/bin/loolmount: Operation not permitted

2022-05-25 06:39:58,stdout,e[1me[31mfrk-00025-00025 2022-05-25 06:39:58.943830 [ forkit ] ERR  Failed to unmount [/opt/lool/child-roots/BbrolKRHzRkiU4iR/lo].| common/JailUtil.cpp:70e[0m

2022-05-25 06:39:58,stdout,sh: 1: /usr/bin/loolmount: Operation not permitted

2022-05-25 06:39:58,stdout,e[1me[31mfrk-00025-00025 2022-05-25 06:39:58.930547 [ forkit ] ERR  Failed to unmount [/opt/lool/child-roots/BbrolKRHzRkiU4iR/tmp].| common/JailUtil.cpp:70e[0m

2022-05-25 06:39:58,stdout,sh: 1: /usr/bin/loolmount: Operation not permitted