So I have 17 wordpress sites that I am moving from Server A to Server B.
All the sites have been up and running on Server A for over 2 years, no recent changes (ie, no new plugins, no new themes) to any of them.
I have moved all the files and all the databases to Server B. All good. Created MySQL users, gave permissions, all good.
Problem: Some sites work, some sites don't.
The sites that don't work are just a blank white page. Sometimes I can login to the admin, sometimes I can't.
Problem: Some sites have plugin errors (didn't exist before move)
The sites that don't work often have a bunch of PHP errors related to various plugins that prevents the site from loading.
The sites that work, work as if they were never moved.
Any ideas of whats going on?