Hi @CasseyG,
We manage Google Workspace for the the Canary Islands Government schools (Spain). You can check the service we provide in https://www.canariaseducacion.es
Our teachers can open SketchUp for Schools. But when students try to use it, they enter a login loop like Sketchup for Schools Caught in Authentication Loop.
Could you check if our domain (@canariaseducacion.es) is allowed to access?