Onlyoffice is not working anymore

Hello to all,

I ve updated NC from version 17 to 18 with docker
With version 17 and before I ve used onlyoffice with it own docker image and configured the url in onlyoffice app.
With the last update I am not able to use my onlyoffice image, I am not able to use the onlyoffice demoserver and I am not able to use the Community Document Server.
I ve installed Community Document Server by downloading it manual untar it to custom_apps (also tried apps) folder, changed permissions and activiated it - tried with web interface and with occ cli.

There is no “new document” under the “+” button and I can not open a document.

can someone give me a hint, how I can get running onlyoffice.

There is no need for me to run Community Document Server, it is also fine to use my own onlyoffice docker image.