Issue Unable to run Grav installed on sub-directory load with the root URL

[PeopleInside]

Server operating system version

Ubuntu 22.04.5 LTS

Plesk version and microupdate number

Plesk Obsidian 18.0.67 Update #1

I'm trying to move a grav install from www.domain1.ext/grav to www.domain2.ext/grav and made the URL to load without the sub-directory so should be www.domain2.ext
I followed the Grav official guide here: Change the site URL but seems on Plesk I get always a browser redirect issue.
The guide seems to be correct as I see other users followed with success Subfolder "grav" in url

Plesk maybe the reason of that issue?
I don't understand why I'm unable to get grav work correctly.

Need help moving / setup grav on subdirectory but root URL

Hi, I hope this message finds you well I’m trying to move a Grav install from a domain to another domain. I was able to see all works just moving the folder in the new domain but what I want do this time is hide the subdirectory from the URL. My new domain is www.newdomain.ext Grav in...

discourse.getgrav.org

Any idea that can help?

 

[PeopleInside]

Seems the issue is only with a try to setup an existing install, a new install doesn't have this issue.
Maybe so it's something related to Grav