Hello, we’re sorry to hear that you’re facing issues with the payment for Rank Math Pro. The error message you’re seeing indicates that the transaction was unsuccessful.
To troubleshoot this issue, please follow these steps:
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Ensure that the country selected in the dropdown menu at the top-right corner of the checkout page is the correct one. If it’s not, click on it and select the correct country.

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Turn off any VPN or proxy server that might be enabled. Some browsers have built-in VPNs, so check the browser settings to ensure it’s turned off.

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We would recommend turning off your ad blocker while attempting the transaction. Even if you did not install one, review your browser settings, as some browsers have built-in ad blockers.

If you continue to face issues after following these steps, please feel free to reply to this ticket, and a human agent from our support team will assist you further. Thank you for your understanding.
Sources:
I Purchased Rank Math PRO but Rank Math is Still Showing FREE » Rank Math
Troubleshooting Payment Issues at Rank Math » Rank Math
This is an automated reply from Rank Math Support Bot. If you need further assistance, please reply to this topic and a human support agent will reply to you shortly.
Hello,
Since we did not hear back from you for 15 days, we are assuming that you found the solution. We are closing this support ticket.
If you still need assistance or any other help, please feel free to open a new support ticket, and we will be more than happy to assist.
Thank you.