If you haven't already done so try a full version update. Next idea try using an existing listing and alter everything except the return policy, if it works use that listing as a template. If it doesn't work I would do a back up and then uninstall TL and then re instal it and restore your data from backup
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It says in this book I am reading that by 2065 80% of women will be overweight.
See what a trendsetter I am?