Rebooted my server, apache is working again and got back in ispconfig admin area. Solved, thanks.
I'm quite sure that snippet was not in my vhost file, but I found it in *.vhost.error file. I removed my corrupted vhost file from both...
I added this snippet and my sites and admin panel urls won't respond anymore. Any ideas how to recover? I didin't find a file where this is...
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