I have successfully installed Amazon Pay Extension 1.2.5 on my Magento 2.2.0.
Now, i am able to see the Amazon Pay button on my checkout page. Also, i have done configurations of Merchant_id, Access Key, Client Secret key and Client Secret Access key. in the Admin section.
Now, if i login with my Amazon account, then, after successful login, on the left side the payment methods are not being displayed/pulled from Amazon account.
Please help me to resolve this issue ASAP.
Note: Attached is the Screenshot of Error on Checkout Page.