Why am I getting security message?

No one is able to complete registration because an error message keeps popping up "Security Error: Security header is not valid". Why?

Generally, this message appears when there is an issue with the login information or API details. Please try removing the API credentials in the payment wizard, then re-enter them. If you copied and pasted the data, make sure there are no spaces before or after the information. We recommend first pasting them into a text-editing program such as Notepad to ensure this.

Please get back to us if the issue still persists. We will be happy to assist you further.