This is the Amazon side issue. The solution here is to try to minimize this issue. It will not fix this issue, but it should be able to list some of your books.
- Download version 3.9.3 here.
- Go to Feed screen. You need to choose to view the feed history for the past 30 days. This issue started around the end of July.
- Click on failed feed. If you see the Error-code is 8567 (1), then there is a button called Fix Error 8567. Click on it. TurboLister will modify your feed and resubmit it.
- I think Amazon is aware of this issue, so you can try to repeat this step daily.
Thanks for your feedback.