We have confirmed that Wolfram App (Mathematica) activation through SSO is now working successfully on multiple campus lab computers.
Wolfram has not yet officially confirmed that the underlying service issue is resolved, so we will continue monitoring the service. Members of the campus community who have encountered an activation error should try again now.
If the issue persists, Wolfram recommends contacting its Customer Support team by chat or web form:
https://www.wolfram.com/support/contact