members plugin – problem

Hi
I recently noticed that the Add Pages functionality within the WordPress backend was no longer available.
I disabled all plugins – Functionality returned
Activated plugins one by one – Seems that the Membership Plugin is the culprit.
I then activated the 2021 theme, the plugin still broke the add page functionality

Has anyone had this problem and found a solution

The page I need help with: [log in to see the link]