‘tag’ URLs not showing 404

With the Twenty Seventeen theme and no other plugins activated it works fine on my testing site. Seems to be a problem with the theme or with one of the plugins you’re using. Please follow the steps described in this checklist https://petersplugins.com/please-follow-these-simple-steps-if-you-have-any-problems-with-one-of-my-plugins/ and let me know about the results. I’ll try to fix it.

Regards,
Peter

I completely forgot that this was an issue haha. I will try and investigate as per your checklist