Hi @melindahelt,
Thank you for your reply. I tried to deactivate all the plugins and found that elementor is the plugin that causes the problem. I can enter payment information when I deactivated it. However, I do need elementor for my website. Could you tell me what do I need to do in order to fix the problem that elementor is causing?
Thank you very much!
Yes, the version is 3.6.4.