Thank you. I don’t think I changed API Keys or Signing Secrets. However, it is entirely possible that I created the Webhooks on Stripe rather than using the button in the plugin. I don’t recall for sure because it’s been awhile since I set this up, but as I have experience creating webhooks in Stripe for other things (that don’t have such a button) it’s very possible I did it that way.
We are migrating the site to a new server next week. I think I will complete that move before doing the further testing you’ve suggested as then I can also make sure everything is working well on the new server.
If we can keep this topic open for now, I should be able to get back in a week or so with the (hopefully successful) outcome!
Thank you again. Your support has been really good!