I created a new developer account, one that is associated with our company's merchant account. I had the same problem, but I think I found a workaround. Here is a description of how to reproduce the problem. When I log in with the sandbox merchant account, on the Home page, I click Create an Invoice, which is way to create one quickly. I enter an email, a description, and a dollar amount and click Next. This then goes to the Edit Invoice page, where all I do is click Send Update. This is where it fails, with the following message displayed at the top: To save or send, please confirm your email address (email appears here) first. Resend confirmation email. When I click Resend confirmation email, it fails with the error message: Sorry. There was an error. Please try again later. However, if I go through the full process of creating an invoice (Home > Invoicing > Create Invoice), then it seems to work. I can the create and send the invoice without a problem, and notifications appear in the Developer dashboard > notifications. Using the workaround, I can manage for now. The new problem is that no webhooks are being sent from the sandbox to my test URL. I enabled webhooks for all events, and it should have sent one when the invoice was created and sent. If you any suggestions to help with that, it would be appreciated. Best regards, Rob
... View more