Single Post Page Is Blank

The guy who helped us set up the website has been extremely busy lately, and so I was wondering if someone would be patient enough to help us get our site working again. All of our single post pages (example) seem to have a header, but no content.

I’ve looked around past posts that were similar to the problem I’m having, but I couldn’t figure it out. I’d really appreciate it if someone could help me out!

Happy soon-to-be new year btw!