Wow thanks a lot for your help it worked this is the step ive done to revert back to Collabora Online 3.5.3 and now it is working
1- In nexcloud active apps page disable the apps “Collabora Online” 3.6.0
2- In nexcloud disable apps page remove the apps “Collabora Online” 3.6.0
3- In ssh on the UCS server you need to find docker container id
root@cloud:/# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
2fedffc6d0d7 docker.software-univention.de/collabora:4.2.2.1 “/bin/sh -c 'bash st…” 12 hours ago Up 12 hours 0.0.0.0:9980->9980/tcp wonderful_brattain
d9c5ae57ed42 docker.software-univention.de/nextcloud:18.0.4-0 “/bin/sh -c /usr/sbi…” 21 hours ago Up 12 hours 0.0.0.0:40000->80/tcp determined_shamir
4- Transfer the richdocuments.tar.gz to the UCS server with WinSCP. The file can be download here
https://github.com/nextcloud/richdocuments/releases/download/v3.5.3/richdocuments.tar.gz
5- Copy the gz file in the docker container - docker cp richdocuments.tar.gz :
root@cloud:~# docker cp richdocuments.tar.gz d9c5ae57ed42:/var/www/html/apps
6- Go inside nextcloud docker container
root@cloud:~# univention-app shell nextcloud
root@nextc-57258297:/#
7- Extract the .gz file and give the same permission as other folder
root@nextc-57258297:/var/www/html/apps# tar zxvf richdocuments.tar.gz
root@nextc-57258297:/var/www/html/apps# chown -R www-data:nogroup richdocuments
8- Return in nexcloud apps page and enable the apps “Collabora Online” version 3.5.3
Collobara Online 3.5.3 work again
Thanks again for your precious help i learn alot with your help !