Hello thomlin !
The error 500 has the traces left in the server's error log. Please check and provide us what do you have there in the moment of the redirect.
No, it should be fine.
When I add it, I get a 500 server error when I try to access Studio.
Thanks for checking my server, LeonidS. So far we know, that I have to talk to my server host, since I run UNA on a shared virtual server environment, that might prevent modules from functioning as expected.