Office Online Excel tabs

we have upgraded our nextcloud instance to version 24.0.1. now we have the problem that in office online the tabs of the excel documents are no longer displayed. do you have any information about this or how can we delete the problem.

Install Custom CSS Plugin go: /settings/admin/theming In the settings, add a style that fixes the error:

#officeonline-wrapper { top: 0 !important; }

Hi, I can’t find the file that I have to modify. Could you explain more detailed, please?