400 Bad Request when clicking on “Log in with Amazon” button

I’ve followed the advice on the American version of these forums, and added my site’s domain name that that Java Script SDK is being used on to present the pop up Javascript window to allow Amazon log in and payment. I still get the same 400 error message saying that I’ve not whitelisted my site in the JavaScript origins section in the Amazon seller central console. I’ve used the https protocol, domain name (test.tirnaelectronics.co.uk ) and I’ve tried :8443 and without at the end of the domain name, both with the same error.

did you solve this issue?

I’m having the same problem with amazon pay button.