font end add auction stops working

Whenever I activate the Membership 2 Pro plugin the "Add Auction" page show this error message "Sorry, your nonce did not verify." The only way to not get this message is to deactivate the plugin. The "Add Auction" page is somewhat of a tab like menu option that comes up on every page so it doesn't have its own individual page in the admin dashboard. When going to the admin dashboard you won't find it in the pages or menu section so I can't find it in any of the options under Membership 2 Pro. How can I get this page to work with this plugin? The plugin does something very important on my page but it's stopping users from doing the most important thing. I can't find any other plugin to do what this is doing so can you please help because I really need this plug in.