Paypal express error 35

[twitchtoo]

Yep, first thing I did - upgraded from 153 to 154. As I said, I expected to have to go through the re-install, but I didn't. Can/should I "force" a re-install?

It appears your site files have not been upgraded to 1.54 if you are getting this error.

I'm uncertain about any of the details related to your 'upgrade' to 1.54. If the site was upgraded properly all the new 1.54 files would be up and running with an upgraded database and the original error would not exist.

Did you follow the ZC instructions to perform an upgrade from 1.53-1.54?

Did those files get published to your live site?

What happened to the old files on the server?

[jenpen]

You're right, there's a detail I missed. I'll fix it and get back to you. Thanks for your pointers so far.

[jenpen]

Progress! A different error now:

We are sorry for the inconvenience. The PayPal account authentication settings are not yet set up, or the API security information is incorrect. We are unable to complete your transaction. Please notify the store owner so they can correct this problem. (10002) 10002 Security error - Security header is not valid

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

[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.