Adding this package to my project broke the Settings tab in the back office.

The issue is when using dependancy injection the controller in this dll is not being registered, and throws an error. The solution is to add a reference to the dll in the project and add a line similar to this in your DI registration class.

builder.RegisterApiControllers(typeof(dtp.umb.scsseditor.Controllers.ScssFilesApiController).Assembly);

I request this package be made available on nuget so adding a local reference is not necessary, and update the documentation to include this piece of information