Custom code not present in editor after wordpress site migration

I changed my wordpress installation from one domain to another and everything works except for the styles file I set up using your plugin is now empty.

I downloaded the entire database and opened it up and searched for some of my custom classes and they are still present in the DB but not showing up in the editor on the wp dashboard. Please help me get them back, this was a good few days work.

https://www.ads-software.com/plugins/custom-css-editor/