500 Internal Server Error

Hi all,

I install my second domain and it’s address was https://www.seconddomain.com/wordpress
Because I want my second domain to have address https://www.seconddomain.com I moved my wordpress folder on the root level and then this “500 Internal Server Error…” occur.
– checked my check wp-config.php – ok
– checked my .htaccess – ok
but I still have “500 Internal Server Error…” and I can’t login directly in wordpress seconddomain site, though I try login with:
– https://seconddomain.com/wordpress/wp-login.php
– https://seconddomain.com/wp-login.php
– https://seconddomain.com/wp-admin/maint/repair.php

My firstdomain.com site works perfectly.
Please help me out of this problem, because I already choose the hanging tree!