I am using Membership plugin and I am having horrible

Hello

I am using Membership plugin and I am having horrible issues all of a sudden.

Users cannot access their levels anymore.
When I try to delete and reset all subscriptions and levels, the problems persists.

On top of that it seems like I cant clean up users' recent history of past membership levels they were assigned to.

It's just a mess and I cannot change the access level shortcode because I already pasted it on 3000 posts. So I need a solution to make this work again like before but without changing the level shortcode.

Please assist asap

Thank you