Hi @stoaufik,
Which payment gateway are you using? Did you contact the gateway plugin support?
For better assistance, can you provide screenshots showing the issue on your end? For screenshots, you may use https://snipboard.io – please follow the instructions on that page, then paste the URL in this thread.
Additionally, please can you share a copy of the following:
- System Status Report: Navigate to WooCommerce → Status. Select Get System Report and then Download for Support.
- Fatal Error log: Share a copy of any fatal error log found under WooCommerce → Status → Logs.
You could copy and paste your reply or share it via Mozilla Community Pastebin and share the link here. This will help us investigate further and provide you with a more accurate solution.
In the meantime, you can run a conflict test to help you identify the cause of the issue. More info: https://woo.com/document/how-to-test-for-conflicts/
Let us know how that goes for you. Looking forward to hearing from you!