hi, I will receive the following message in my email inbox: "Please check your server that handles PayPal Instant Payment Notifications (IPN)." I found that this error is specific to my sandbox. Upon checking the URL, I found that the IPN URL is configured for the sandbox environment. However, my testing environment is not frequently operational, which is why this error occurred. What should I do in this case? Should I remove the sandbox settings on PayPal?
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