[SOLVED] Migrating to another directory went wrong...

[Studio 42]

A 500 error, is a internal code error.
Some component use obsolete codes crashing in new Joomla 3.X (and some do not work in new VM release)
Remove obsolete components,plugins,modules using the Joomla extention manager or try to find a compatible release update.

[garikello]

Solved it...

Strangely enough for the cases of migrating webpage form subdomain to main domain nobody is suggesting to change the set path for files of the domain name in the server settings.

Just did that. It took 3 seconds.

Webpage is running with almost no problems. Several components had to be reinstalled, but other than that it seems to work fine.

Perhaps there is something I should check before believing that wverything is working?

[GJC Web Design]

change the set path for files of the domain name in the server settings

have no idea what you mean by this and have never done something like this on any server or folder move

[garikello]

When you connect your domain name with hosting server, you must set the path, where the files of the page for that domain are located.

I just changed that path.

[GJC Web Design]

you must be using something other than cPanel

or did u have your root domain pointing at a subfolder?

[garikello]

 I am using CPanel.