Incorrect canonical URL after website migration

You should try to “reset indexables”. There are two ways:

https://developer.yoast.com/blog/yoast-test-helper-easy-testing/
https://developer.yoast.com/customization/yoast-seo/indexables-cli/

Thank you @stodorovic. I wasn’t able to try your solution BUT I simply updated my Yoast Plugin (it was a version out of date) and this fixed everything. I wonder if the plugin you suggested would have done that had I not needed to update my plugin.

I think I spoke too soon. Thank you @stodorovic ! I had to use the plugin anyway. I think the indexables was causing the problem. Once I reset that, everything worked fine.