422 error when embedding

I am embedding a simple Threekit player and encounter this error:

GET https://admin.threekit.com/api/cas/aac6c766-edd2-463a-889f-35ab1d24a55?type=Node&bearer_token={TOKEN} 422

{"status":422,"code":"invalid_parameters","message":"Invalid parameters in the request"}

Make sure all the parameters for your embedding are correct. Double check your assetId and stageId if you are embedding with one.

Make sure that the token you are using is a Public token and the right one for your domain. If you open your browser console and run window.location.host you’ll get the host that you should use when creating your token