Moving my blog to a different page

Hello. I want to move my blog from https://www.example.com to https://www.example.com/blog.

I moved the files to the /blog directory. I had an error with a plugin (fixed it, it had a broken path).

Now, my blog doesn’t seem to show the theme. Unfortunately, I’m not sure where to fix this since I’m not getting a detailed error anymore. Where should I look for broken paths?