Internal Error after applying settings

[Deamount]

Hi! I am trying to test OnlyOffice integration with Redmine. Ubuntu 22.04, redmine 5.1.2, ruby 3.1.2, rails 6.1.7.7, onlyoffice_redmine 3.1.0

Installed onlyoffice server docs by this commands:

wget http://download.onlyoffice.com/docs/docs-install.sh
bash docs-install.sh -dp 8080

I don't know why, but after installation, the port remained 80

I try to use demo onlyoffice server.
when I tried to save the settings and got an 'Internal error' at the page top.

production.log:

when I try to use a local server, the problem is the same

Can anyone help me?

[Deamount]

I will add that for some reason the file lib2/resourses/document-formats/onlyoffice-docs-formats.json was not found after installing the plugin. copied by cloning from the repository. after copying the file manually, the plugin started working.

[CV-engineer-CDD]

HI , I encountered the same error and my env is the same as yours ， but I can always find lib2/resourses/document-formats/onlyoffice-docs-formats.json .

[CV-engineer-CDD]

Did you find any solution about 'Internal error' when you try to edit ip:port in the plugin