NC23: How to enable Nextcloud Office

[rollanders]

Your comments helped me. See

Nextcloud adds a duplicate upper menu when trying to open or create a odt document

This was solved. It seems Collabora has changed some settings and I needed to edit my /etc/nginx/conf.d/nextcloud.conf according to these instructions. https://sdk.collaboraonline.com/docs/installation/Proxy_settings.html#reverse-proxy-with-nginx-webserver