Amazon payment issues

I have working in german client site.
I have signed up my (temporary for testing purpose) account using this link
I have integrated above account to core php. And I have include this js
But I am facing javascript error when clicking the pay with amazon button -

Please tell me the solutions


I would recommend that you create a case with Amazon so that this can be checked in more detail for you.
To create a case please click on this link when you are logged into your seller account [Get Support|Amazon Sign In]. The link is available at the end of any page in your seller account.