Paypal express error 35

[twitchtoo]

Progress! A different error now:


The Paypal settings are all correct. What does "Security header is not valid" mean?

Paypal says this...

Error code: 10002

Short/Long Message:
Authentication/Authorization Failed - Username/Password is incorrect

Correcting This Error:
This error can be caused by an incorrect API username, an incorrect API password, or an invalid API signature. Make sure that all three of these values are correct. For your security, PayPal does not report exactly which of these three values might be in error.

And be certain you have PayPal Express set for 'Live' NOT 'Sandbox'

[jenpen]

OK, OK, OK! I misunderstood "sandbox". I thought it meant "testing mode" and I assumed it would be invisible to customers. Wrong and wrong! I took it out of sandbox and now it's working fine.

But, what is sandbox for if not testing?

[twitchtoo]

Great to hear it's working!

Sandbox requires its own paypal sandbox credentials for testing.

[mutinyzoo]

I had the same error even after the upgrade to 1.5.4 and creating new Paypal API signature seemed to solve it.