Full blog page won't load

When opening my blog page, https://blog.promevo.com , the page does not fully load and none of the previous content is there. It also takes a much longer time for the page to load. All the blog post pages can still be pulled up if they’re searched separately, but can’t be accessed from the home page. I have updated all the plugins, themes and software and still no change.

I need some help figuring out what to do to get my blog home page looking normal again.

[moderated to fix link]