Application won't run - says "too many failed jobs" or token expired?

Hello -- my ShipRush program was not uploading current orders from Ebay, so when I clicked on the Settings . Web Stores > Ebay, the following message appears:

"This webstore misbehaved and was disabled. Reason: TooManyFailedJobs. Auth token is hard expired, User needs to generate a new token for this application.
Auth token is hard expired, User needs to generate a new token for this application."

Please let me know how to fix this. I do do not know what "too many failed jobs" means. I've not have any issue in my Ebay store.

thank you.