teams project will not let me accept invite

first off, both of us have the updated premiere and everything. we've both used teams successfully before.

for some reason wheneever he tries to invite me to a teams project, when i click accept it just blinks and sits in my invites. i've tried to accept via the creative cloud notification, i've tried to accept within premiere itself. they only thing i can do is decline (so the invite notification goes away). however, sometimes i AM able to convert current project into a teams project and invite him and that works. but it's annoying that my program does not let me accept invites.... it used to...