Please can someone help, I have setup at least 5 different sanbox account and every time I try to log back in I get the cryptic Oops, that's not a match.
Please submit a contact-us request for linking the PayPal account to your eBay sandbox account.
Navigate to URL https://developer.ebay.com/contact-us and follow the steps given below:
1. Go to the "Help with the eBay Sandbox" section.
2. Open the "I need to link my eBay and PayPal Sandbox accounts."
3. Fill the mentioned information and Submit a request.
Best regards ,
eBay Developer Support
I had the same problem but realised what my problem was. You can only log in with a sandbox test user account, not with a normal ebay seller account. To set up sandbox test user accounts you need to be logged in to the Developers' area and then go here: https://developer.ebay.com/signin?return_to=%2Fsandbox%2Fregister
Hope that helps someone!
A simple message on the login screen would have saved me hours of head-scratching. The documentation for these APIs really is disorganised, and scattered across hundreds of pages, with endless "You need to to x, click here to read about x", which means you end up with loads of tabs open. Please someone at ebay rewrite these docs!!
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