You’ve provided an invalid payment policy. ErrorCode: 21917328

Here is how to fix it:

1. Go to your Nembol account
2. Channels Page
3. eBay settings
4. Open the “List to eBay” section and scroll down until you find the Business Policies, at the very bottom (see screenshot)
5. Make sure you’ve selected the payment policy you want to use as default.
6. Save!
7. Then go to your Policy Manager on eBay and update this policy.

Make sure that every field is correct and updated.