This message can be caused by a couple of different issues: 1) an issue with the status of your Seller Central account and 2) a disconnect in the link between your Seller Central and ScanPower accounts. Please try a couple things and contact Support if the issue persists after this.
please log on to your Seller Central account and confirm that your account is in good standing with a valid credit card on file
please log on to your ScanPower account from a computer using either Firefox or Chrome at https://unity.scanpower.com and navigate to https://unity.scanpower.com/mws/ to re-establish the link between your Seller Central and ScanPower accounts.