Fix Card Payment Gateway

Job ID: 40349853

Budget: $10 – $30 USD

My site is live but customers can’t complete credit / debit card payments. Everything else works, so the task is strictly about restoring that payment-processing functionality. I need you to pinpoint the root cause, apply the necessary code or configuration fix, and confirm that transactions go through from checkout to confirmation.

To make expectations crystal-clear, here’s what I’d like back from you:
• brief diagnosis summary outlining the fault you found
• corrected code or settings applied (gateway keys, webhook, API call, etc.)
• proof of at least one successful test charge in both sandbox and live mode

Please be comfortable working directly on a production site—safeguarding existing data is essential—and be ready to start right away.