Waiting for administrator but no notification

Hello,

I have been added as an administrator to a Facebook page, but I am not receiving any notifications about it on my personal account. However, on this Facebook page, it says "invitation pending". I have looked everywhere, and there is nothing indicating that I have been sent an admin request. (I follow this page and I am friends with the other admin who is adding me)

Yet, I am an admin of another page, and I didn't have any issues.

I don't know what to do, if anyone can help...