Plug in settings not working

When I want to go into the settings of any of my plug ins – serious slider, spiffy calendar, WD Button, etc. I get a page that looks like safe mode, except the words are on top of each other. It makes them unusable. This didn’t happen a couple of weeks ago. I cleared my browser history, logged out then back in, rebooted my mac, and it is still happening. Not sure if its a setting somewhere? I can send a screen shot if that helps.

Website: www.layloyoga.com