Hey Edwin,
That was difficult for us to tell you where causing this 500 error without checking on your site.
Based on what i see on your site URL, it seems like you working on your locally?
is it possible temporary upload your site to live so we can able to check on this issue directly?
If that is not possible, perhaps you can try following step and see whether can find out what is the real error of this?
1. Turn on error reporting to maximum (screenshot :
http://take.ms/yd0pI )
2. Try access that profile type page from backend and see is it got show any proper error message?
3. If don't have, can you try check your error_log file and see any error generated?