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You get this error message when you reach your call limit. You can check your call usage by looking at the API Reports. Your limits are determined based on your application status level. If your application is working efficiently, and you need higher limits, you can apply for the Compatible Application Check. If you are already have done the Compatible Application Check, you must review your application design and ensure that it does not hit the limit. If you need assistance, you can file a Support Request and we can work with you on the issue.
Note. Developer should not display this error to your end user. However; if an eBay user is experinecing the error when use an eBay app, here is what you can do:
1. Check our system announcements board to see if there are any known issues or bugs that we're currently working on.
2. If the issue isn't on the list, report the problem to us.