internal server error

Hey,

So I installed WordPress in a subfolder on my server. Once I had everything setup how I wanted it at https://www.maindomain.com/subfolder I pointed https://www.subfolderdomain.com to subfolder.

Then in https://www.subfolderdomain.com/wp-admin I changed site URL from https://www.maindomain.com/subfolder to https://www.subfolderdomain.com

Thought this would work but I’m missing some sort of crucial step because all my pages are showing up as “internal server error”.

WUG thoughts?

thanks

links are examples only don’t click on them