“400 Bad Request” for Amazon DE Seller

Get error message “400 Bad Request” for Amazon DE Seller – The redirect URI you provided has not been whitelisted for your application
If you are DE Seller on Amazon and getting “400 Bad Request” when process with Amazon pay payment
Please add below URLS on your Amazon pay account “Login with Amazon”
under “Allowed Return URLs” application settings.
“https://payments-de.amazon.com/gp/widgets/hosted/hostedLWAParameter”
“https://payments-de-sandbox.amazon.com/gp/widgets/hosted/hostedLWAParameter”
You can accomplish this by logging into Seller Central and selecting the
“Login with Amazon” option from the dropdown in the upper right.
On the resulting page, please look for
“Allowed Return URLs” fields under “Web Settings” and then ensure that you specify the appropriate URLs in these fields.
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