My shared album won’t let me invite any more participants

Hello, I have a shared Apple album and I have invited 51 people ( this is not the max) all of those people are able to see my pictures with no problems. However, when I try to invite more people, it won’t allow me. It doesn’t even show the invite button anymore. I’ve contacted Apple. They’ve had no solutions. I’m wondering if someone here might know anything or have a suggestion. I’ve tried updating, restarting, Apple had me do a few things too. Nothing seems to be working. And unfortunately, there it might just be a bug that needs to be fixed. Thank you I appreciate any thing you have to offer.