Failure to Log-In to Microsoft365 Account AADSTS7000112

I input my microsoft365 account for school into the system (I’m on the free trial), and everything is good on the emClient end. But after it has me input my password and authenticate, Microsoft365 gives me this error code: AADSTS7000112: Application ‘e9a7fea1-1cc0-4cd9-a31b-9137ca5deedd’(eM Client) is disabled. Does anyone know how to fix this? If I can’t use emClient with my school email, I won’t use it at all.

See @Gary post below on how to fix that.