Maybe you accidentally removed permissions for our MWS access on Seller Central. Or you may've been suspended by Amazon. It's also possible it expired and needs to be updated. If you log into your Seller Central and check here Amazon MWS Permissions Manager to make sure we still have developer access to your account. Then just make sure your MWS token there and Seller ID match what is in SellerChamp. Seller ID would be here

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