Error 400 Message Question

Has anyone else run into this problem?

We have one teacher unable to connect Google account to Kami after Kami Extension installed. Kami request authorization to her Google account, but even after giving the okay- the error 400 message comes up. The teacher has the proper license code and is properly logged into her school Google account and into to Kami using that same log in.

I’m not sure how to even go about dealing with this issue and any help would be greatly appreciated.