Error Fatal

If it’s a PHP fatal error maybe PhP XML needs to be installed. That was my issue.

https://www.ads-software.com/support/topic/the-name-com-page-isnt-working-name-com-is-currently-unable-to-ha/

@jesusjrincon which error? What text does it have?

If you see some “user-friendly” error, then you should find out real error, that hides behind.

See it in php error log, ask your hoster where to find it.