This is an ongoing intermittent technical issue.
I'll tag marco@ebay one of our Community managers , who I know was looking into this issue earlier on this year, perhaps he can add your account to the bug report for eBay's Tech team to take a look at for you.
@dianmarsto4
If not sold you may need to just take it to the Post Office and buy ove the counter tracked postage. Ensure the tracking number is the correct one, when adding it , when marking the item as dispatched.