Hi Community,
On my Ubuntu 20.04 device I have installed collabora code with the apt-get paket manager - based on this wiki . All worked fine.
Now I have performed an update, which also affected collabora code - its now given in version:
- LOOLWSD 6.4.10
- LOKit Collabora Office 6.4-44
The update made some mods on the t/etc/loolwsd/loolwsd.xml so I repeated the following config commands, which I already executed when I installed this initially:
loolconfig set ssl.enable false
loolconfig set ssl.termination true
loolconfig set storage.wopi.host my.domain.local
loolconfig set-admin-password
systemctl restart loolwsd
The service loolwsd is running and I also can open and modify files, exemplary by using nextcloud.
So far, so good 
But I just cannot launch the admin console under https://my.domain.local/loleaflet/dist/admin/admin.html - as it keeps on saying:
The server was shut down, please reload the page.
But thats not true, because I can work with documents.
Also I get this:
systemctl status loolwsd
● loolwsd.service - Collabora Online WebSocket Daemon
Loaded: loaded (/lib/systemd/system/loolwsd.service; enabled; vendor preset: enabled)
Active: active (running) since Sun 2021-07-18 15:00:45 CEST; 12min ago
Main PID: 31420 (loolwsd)
Tasks: 13 (limit: 3997)
Memory: 412.4M
CGroup: /system.slice/loolwsd.service
├─31420 /usr/bin/loolwsd --version --o:sys_template_path=/opt/lool/systemplate --o:child_root_path=/opt/lool/child-roots --o:file_server_root_path=/usr/share/loolwsd
├─31431 /usr/bin/loolforkit --losubpath=lo --systemplate=/opt/lool/systemplate --lotemplate=/opt/collaboraoffice6.4 --childroot=/opt/lool/child-roots/ --clientport=9980 --masterport=loolwsd-AHp1q5o4 --rlimits=limit_virt_mem_mb:0;limit_stack_mem_kb:8000;limit_file_size_mb:0;limit_num_open_files:0 --version --ui=classic
├─31588 /usr/bin/loolforkit --losubpath=lo --systemplate=/opt/lool/systemplate --lotemplate=/opt/collaboraoffice6.4 --childroot=/opt/lool/child-roots/ --clientport=9980 --masterport=loolwsd-AHp1q5o4 --rlimits=limit_virt_mem_mb:0;limit_stack_mem_kb:8000;limit_file_size_mb:0;limit_num_open_files:0 --version --ui=classic
├─31932 /usr/bin/loolforkit --losubpath=lo --systemplate=/opt/lool/systemplate --lotemplate=/opt/collaboraoffice6.4 --childroot=/opt/lool/child-roots/ --clientport=9980 --masterport=loolwsd-AHp1q5o4 --rlimits=limit_virt_mem_mb:0;limit_stack_mem_kb:8000;limit_file_size_mb:0;limit_num_open_files:0 --version --ui=classic
└─31942 /usr/bin/loolforkit --losubpath=lo --systemplate=/opt/lool/systemplate --lotemplate=/opt/collaboraoffice6.4 --childroot=/opt/lool/child-roots/ --clientport=9980 --masterport=loolwsd-AHp1q5o4 --rlimits=limit_virt_mem_mb:0;limit_stack_mem_kb:8000;limit_file_size_mb:0;limit_num_open_files:0 --version --ui=classic
Jul 18 15:01:41 webqa1 loolwsd[31420]: wsd-31420-31931 2021-07-18 13:01:41.428931 [ docbroker_001 ] WRN Tracker tileID 0:11520:3840:3840:3840:0 was dropped because of time out (8607ms). Tileprocessed message did not arrive in time.| wsd/ClientSession.cpp:1957
Jul 18 15:01:41 webqa1 loolwsd[31420]: wsd-31420-31931 2021-07-18 13:01:41.429012 [ docbroker_001 ] WRN Tracker tileID 0:7680:3840:3840:3840:0 was dropped because of time out (8607ms). Tileprocessed message did not arrive in time.| wsd/ClientSession.cpp:1957
Jul 18 15:01:41 webqa1 loolwsd[31420]: wsd-31420-31931 2021-07-18 13:01:41.429072 [ docbroker_001 ] WRN Tracker tileID 0:0:7680:3840:3840:0 was dropped because of time out (8607ms). Tileprocessed message did not arrive in time.| wsd/ClientSession.cpp:1957
Jul 18 15:01:41 webqa1 loolwsd[31420]: wsd-31420-31931 2021-07-18 13:01:41.429120 [ docbroker_001 ] WRN Tracker tileID 0:3840:7680:3840:3840:0 was dropped because of time out (8607ms). Tileprocessed message did not arrive in time.| wsd/ClientSession.cpp:1957
Jul 18 15:01:41 webqa1 loolwsd[31420]: wsd-31420-31931 2021-07-18 13:01:41.429197 [ docbroker_001 ] WRN Tracker tileID 0:7680:7680:3840:3840:0 was dropped because of time out (8607ms). Tileprocessed message did not arrive in time.| wsd/ClientSession.cpp:1957
Jul 18 15:01:41 webqa1 loolwsd[31420]: wsd-31420-31931 2021-07-18 13:01:41.429283 [ docbroker_001 ] WRN Tracker tileID 0:11520:7680:3840:3840:0 was dropped because of time out (8607ms). Tileprocessed message did not arrive in time.| wsd/ClientSession.cpp:1957
Jul 18 15:01:41 webqa1 loolwsd[31420]: wsd-31420-31931 2021-07-18 13:01:41.429366 [ docbroker_001 ] WRN Tracker tileID 0:0:11520:3840:3840:0 was dropped because of time out (8607ms). Tileprocessed message did not arrive in time.| wsd/ClientSession.cpp:1957
Jul 18 15:01:41 webqa1 loolwsd[31420]: wsd-31420-31931 2021-07-18 13:01:41.429493 [ docbroker_001 ] WRN Tracker tileID 0:3840:11520:3840:3840:0 was dropped because of time out (8607ms). Tileprocessed message did not arrive in time.| wsd/ClientSession.cpp:1957
Jul 18 15:01:41 webqa1 loolwsd[31420]: wsd-31420-31931 2021-07-18 13:01:41.429581 [ docbroker_001 ] WRN Tracker tileID 0:7680:11520:3840:3840:0 was dropped because of time out (8607ms). Tileprocessed message did not arrive in time.| wsd/ClientSession.cpp:1957
Jul 18 15:01:41 webqa1 loolwsd[31420]: wsd-31420-31931 2021-07-18 13:01:41.429669 [ docbroker_001 ] WRN Tracker tileID 0:11520:11520:3840:3840:0 was dropped because of time out (8607ms). Tileprocessed message did not arrive in time.| wsd/ClientSession.cpp:1957
Or is there maybe another service behind the admin console, having nothing to do with loolwsd ?
Thank you in advance for your kind help 
This certainly explains a lot ^^