Amazon authorization needs to be updated once a year.

Please open the corresponding page below to update the authorization.

America: https://sellercentral.amazon.com/apps/manage

Europe：https://sellercentral.amazon.co.uk/apps/manage

Japan：https://sellercentral-japan.amazon.com/apps/manage

Australia: https://sellercentral.amazon.com.au/apps/manage

Note: if you re authorize after the authorization expires, the authorization code may change.

Click "view" to copy the MWS  code.

Open the page https://qmt.io/accounts/mws

Click "authorize", paste the MWS  code again, and click "save".

Since Amazon interface will have cache, it may prompt authorization failure

Don't worry. The system will automatically retry every 5 minutes. Within about an hour, the authorization will be successful automatically.