Upfront Not Loading Properly - It shows blank

Upfront was working fine and now it's not loading properly. It's says 'all done' but doesn't load properly.

I had installed a testimonial plugin prior but I disabled that just in case that had anything to do with it. Didn't seem like that was the issues.

Here's a screenshot: https://gyazo.com/deace66918f3eecc21fcafaf595c01c8

Please advise.