http://esbjergretshjaelp.dk/wp-login.php
That URL was working previously.
The esbjergretshjaelp.dk page isn’t working
esbjergretshjaelp.dk is currently unable to handle this request.
php pages aren't rendering at all anymore, and I still see a 500 error in your server responses.
Something has changed that has caused php to stop working properly since the last time I looked. Your best bet may be to ask your hosts support group to take a look and see if they can spot anything that might be causing the issue.