So you received the following error message:
Input data for tag is invalid or missing. Please check API documentation.
What does it mean?
In some cases, eBay requires a Package type to be entered and without it, you will not be able to publish your listings.
What needs to be done?
To resolve this, please make sure you select a package type for your listing -
If you are not sure which option to select, you can choose "Letter" - this is the default one used by eBay.
Once you've selected the package type, you can then "Save & Publish" again.
If you have any more questions, you can search our Help Center or, click on the chat tool in the bottom right corner and we'll be happy to help!