Hello ,
Yes, it really sounds like something account-related, especially if other accounts are working fine on the same machine and network. It could be a temporary restriction, quota limit, or missing MaiA access for your account. I’d probably try signing out and back in once, but if the issue still happens only for your account, then it’s best to raise a support ticket with Mendix so they can check it from their side.
MaiA Documentation
Thanks !