Thank you very much for your assistance
It is indeed caused by this plug-in(Payment Reminder for WooCommerce)
Enabling this plug-in(Payment Reminder for WooCommerce) will cause the plug-in(coupon) to fail to display content
But the coupon setting can still work
At present, it can only be temporarily disable payment plug-in.
After the coupon is set, turn on the payment plug-in.
Provide plug-in information for you。
Payment Reminder for WooCommerce
1.0.6 version | Developer:SKROTRON |
WP_DEBUG_LOG has been started but there is no fatal error
The screenshot below is for your reference