I am one of the administrator of an academic team working on a research project using the free licence on Bitbucket. As per the free licence, there can maximum be 5 users inside a team which we already had. So, to make a space for a new user, I removed one previous user from the team, and sent an invitation to this new user.
When this new user accepts the invitation, he is getting the below error:

The members in the team looks like below and their numbers are less than the permissible limit:

Can anyone tell me what is wrong here? And if it is a bug, can someone please resolve this?