Why did I get API error code 10008?

Here are ways to resolve this issue:

If you use a third-party integration such as a shopping cart, there may be a switch between Test/Sandbox and Live/Production processing. Check that the correct value is set.
Supply an API URL if asked to do so. See NVP/SOAP API endpoints for a list of URLs.
Copy and paste your API information into the cart again, ensuring there is no special formatting applied and no leading or trailing spaces or carriage returns.
Verify the type of API information that the cart requires. Ensure in PayPal that you haven't requested the wrong information.

For ASP.NET

If you requested a second certificate:

Delete the old certificate from the Windows Keystore.
Install the new certificate.
In addition, check that the permissions to the certificate are correct.
Check that you're granting the correct user rights to the certificate (using the winhttpcertcfg command).
For troubleshooting, try granting permissions to "Everyone" to see if this resolves the error. If it does, you know that you have a permissions issue.

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