Installed on Classic HC and it renders the game unplayable. My mouse doesn't work (can't click anything) and the "Welcome to SUI" message is stuck on the screen. I also can't hit enter in the chat window so typing /SUI doesn't work. Basically all I can do is press escape and logout. It does appear to be reskinning the UI at least. I disabled all of my other add-ons and still have the problem.

Hello, i found a fix, delete install in Addons/SUI/Config

Hi, this actually worked and the addon seems to be running as intended. Unfortunately, there is no way to customize it.