We have Xtheme 5.1.1 installed. our site is gethappytax.com . It currently works right now, but if I try to activate any of our other plugins it stops working and gives a blank white screen or 500 error.
Never experienced this before. It doesnt matter what plugin I activate it does it.
You can see what we have activated and not: http://d.pr/i/iEMTpq and http://d.pr/i/fOajRP
Please help this is a big issue.