I just installed a brand new installation of IPB 4.1. I go to install a theme immediately after, and I get the "500 error". Does anyone know how to fix this? The theme i'm using is from IPSFocus and it's made for 4.x.
If I switch back to the default theme, then everything works great again.
Seems like some problem with the Forum itself (Atleast as far as i know). Not sure how the themes are coded but i don't think it would cause that error, it would atleast show it but with css and html broken for sure.