I thought maybe there were transient issues with the sandbox environment but it's been a week now and I can't create sandbox users. I get a failure message "An unknown issue has occurred. Contact the website administrator"
I've tried different browsers, clearing the cache, different emails/usernames/passwords/etc. but nothing works. This is my first sandbox user so at this point I'm completely blocked and can't even test. Any suggestions on what I might be doing wrong?
developer-support@ebay.com