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PayPal gateway has rejected request. Security header is not valid (#10002: Security error)

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PayPal gateway has rejected request. Security header is not valid (#10002: Security error)

Hi,

I've set up "Paypal Express Checkout" with all the credential and using the API signature as authentication method.

When I try to pay, it returns the message: "PayPal gateway has rejected request. Security header is not valid (#10002: Security error)"

 

I'm still in "developer mode", and I'm sure that these are the correct credential.

I also tried to turn off the "Enable SSL Verification", but the problem still persists.

 

Did anyone had this problem? And what is the solution?

Thank you!

2 REPLIES

Re: PayPal gateway has rejected request. Security header is not valid (#10002: Security error)

@Arianna_Fra

 

enable log for a paypal method and then after check PayPal log and share Paypal log info into the issue.

 

 

Re: PayPal gateway has rejected request. Security header is not valid (#10002: Security error)

Ok, I will do it!

 

Thank you so much Sunil!