Login Issue for App Building with AppSheet: Challenge Lab ARC105

[minyi]

Im having issue to login to Appsheet with the student account provided. After allowing access to google drive etc. it prompts the error as below:

{"title":"An error occured: UserMap.ServiceDisabledException","status":403,"detail":"ServiceDisabledViaWorkspace","traceId":"00-5531ec3e3168c4463bc780c8ca7f466a-af59ab20358814c0-00"}

May I know how to resolve this?