Onlyoffice failed to open requested file

Does anyone know how to fix this issue?

I have installed manually the app cause it failed from the webui. I have copied from the downloadlink and done a wget to the destination. The I have extracted it and put to the apps folder. I have also applied the www-data permissions and then went back to webui and activated the app. Now when I want to open an office file or create a new one I get this issue from the screenshot

Have you tried right clicking, and then “Open in Onlyoffice”? I had Collabora + Nextcloude Office installed beforehand, so it might have conflicted with the default action.

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If you have OfficeOnline applicatione enabled - disable it. It’s error about another application who not worked this onlyoffice together.

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