Links no longer work

I am not knowledgeable about the techie side of things at all. (That’s why I’m using an out of date version of WP – if I was more knowledgeable, I’d back it up and update the version.) I use a template and write a blog at https://www.ApprehendingGrace.com.

For the last couple of days, some of my links to existing blogs have stopped working. It seems that it takes me to the most current link in the month that the linked blog was written in.

Any ideas?
Thanks, Sandy