This is probably a difficult question because i can't give you a lot of information. When i open the edit screen in the adminside of a module it's being shown for a split second and the the page refreases to a blank page with a input type select.
I already tried to uninstal the admin template and reinstal but the issue is still here. It happens with any admin template i tried so far accept the oldschool Hathor admin template.
I have no idea where to look for the problem. I hope someone else encountered this issue before and has a solution. Or atleast an idea where to look.
Tell me if there is any information i can give you to clearify. Ps I run the latest Joomla version 3.6.5
Kind regards, Jeroen