Issue Nextcloud Your web server is not properly set up to resolve

[kimharding]

Server operating system version

Ubuntu 22.04.3 LTS

Plesk version and microupdate number

Plesk Obsidian Version 18.0.56 Update #4, last updated on Nov 8, 2023 06:27 AM

I have installed a Nextcloud instance using the Plesk installer. Everything seemed to set up smoothly, I logged in to Nextcloud, when to the Administration Overview where I found the following error messages

There are some warnings regarding your setup.

• Your web server is not properly set up to resolve "/.well-known/webfinger". Further information can be found in the documentation ↗.
• Your web server is not properly set up to resolve "/.well-known/nodeinfo". Further information can be found in the documentation ↗.
• Your web server is not properly set up to resolve "/.well-known/caldav". Further information can be found in the documentation ↗.
• Your web server is not properly set up to resolve "/.well-known/carddav". Further information can be found in the documentation ↗.

I followed the link to the documentation and applied the recommended changes to the .htaccess, but that didn't solve the problem. Trying to use caldav from Thunderbird comes up with a 404 error. So somewhere the required redirect is not happening. As Plesk installed that Nextcloud instance, I don't know what the file path should be. How do I sort this out? Clearly, Plesk is not configuring the path correctly on set up.