Express – 10002 – Security header is not valid
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Hi there,
I have just installed the plugin and put in the settings for PayPal Express Live User Name, Password and Siganture. The button shows up on the checkout page but when I click on it I get the error message 10002 – Security header is not valid. Any ideas on what might be causing this?
Thanks…David
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Viewing 4 replies - 1 through 4 (of 4 total)
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