I am getting the error response below when submitting a payment via the event calendar. I have API Username, API Password, and Signature inputed correctly and ssl certificate setup.
Attention: Your transaction was declined for the following reason(s):
Error Code: 10002
Short Message: Security error
Short Message: Security header is not valid
Severity Code: Error
Please login to your PayPal.com account. Then regenerate your API credentials. Then copy and paste this updated information into your payment settings area for PayPal Pro in the WordPress admin.
Be careful of extra spacing before and after your API credentials when pasting them into the payment settings area. This can cause problems with processing payments.
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