Try a different email address, just don't upload the listing with it there. If it works then it is something to do with your email address, if it doesn't try clearing your cookies and cache, closing your browser and re opening it and trying again.
If that doesn't work and you have listed before with the same wemail address choose the sell similar option on a prior listing and edit it to list the new item.
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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?