So I fixed the problem but I don’t really understand how. On the bottom left corner of my Sixbit screen there was a triangle with exclamation point that said there was an invalid token and it needed to reauthorize. Strange thing is that I have 2 eBay accounts and it was the token on an account that I don’t really use. My main account I reauthorized and that didn’t fix the problem. Once I reauthorized my other account I was able to upload photos. Hope this helps you.