Problem with External link

External links (articles) do not work. Instead of Items
404 will be displayed.
If I use the Article button in Details, then target Open in parent window, the article will open on HOME (Main) with all the modules that are there.
Is there any solution?
(Joomla 4.4.3 , GFM J4.14F, PHP 8.1.25, MYSQL 10.11.4 )

I don't want to give a link to a developed website on a subdomain, it is possible to send it in a private message, I don't see any such possibility here.

Ok, I solved the correct display of articles.
The error was in the setting of the articles. But there are too many articles.
By installing Advanced Module Manager, I forced the modules to display correctly.

It doesn't change the fact that "External link" in Items in Gmapfp doesn't work for me, but now I don't need it anymore. Consider it resolved.
Well thank you.