Need help fixing a broken site.

I am having some serious issues with my site. I have installed the Hummingbird Pro version to improve the seed etc. But the pages just crash and do not load properly. Please check and help.

https://cdn.livechat-static.com/api/file/v2/lc/att-old/8801096/ac949c00c6045173016409a52b45a80a/screenshot.PNG

https://cdn.livechat-static.com/api/file/v2/lc/att-old/8801096/b9aa53253927ae792475241705425a12/screenshot%202.PNG