That is rather unusual. we designed the app to be as Chomebook friendly as possible. Do you know if the IT team deployed the app correctly? If you are not sure, please consult this page: As my School's G Suite for Education IT Administrator, how do I deploy SketchUp for Schools?
Also, are you sure your device(s) are able to meet the minimum requirements?
If you are not sure, please consult this page: SketchUp for Schools System Requirements | SketchUp Help
If you are sure that the IT team has deployed the app correctly and that your device(s) meet the minimum requirements, I can take a look at figuring out the next steps to help get you up and running as soon as possible.