Have since Nextcloud 33.0.02 not been able to upgrade. I now have no way to log in to my Nextcloud.
So main question without making any mistakes here when looking for help without being able to provide information about which systems my host provider uses, which template should I use?
donāt be shy - as long you provide enough details it doesnāt matter if or which template you use.
Shared hosting is hard and your first contact should be your hosting provider - only having full access to the system, logs, limits and error allows complete troubleshooting. If you error which didnāt happen before this could simply result from some OS updates or hardening measures they applied in between:
I agree with @wwe. With shared hosting, itās often difficult to provide all the technical details because the hosting provider controls much of the server environment.
I would start by contacting Oderland support, especially since the Nextcloud installation and updates are managed through Softaculous. If they can provide any error messages or logs, you can then share those here and the community may be able to help further.
At least that gives you a good starting point without needing to know all the server details yourself.