Hi,
Clearing cache does nothing.
Here is a screenshot of the link I use for the buttons: https://snipboard.io/QyLWni.jpg
You can find the “Memberships Subscribe Button” that I use for the buttons in: Vendor Dashboard > memberships > Edit Membership > Subscribe Button URL.
The Memberships Subscribe Button URL leads to this message: {“success”:false,”data”:”Invalid nonce! Refresh your page and try again.”}
Thanks.