Error Code 21919188 - you have exceeded your listing limit
This error message indicates that you have exceeded your listing limit on eBay. When you try to submit a listing via StoreAutomator, it will be rejected by eBay due to limitations.
Solution
To solve this error, you can set quantities in stock to 1 or 2 in order to save limits or contact eBay customer support for further assistance regarding your limitations.
To set quantities in stock lower than actual stock, please refer to the link below.