I am getting an error notice from Paypal account on my email

-- HikaShop version -- : HikaShop Business: 3.4.0
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-- Error-message(debug-mod must be tuned on) -- : I am getting an error notice from Paypal account on my email

Hi,

I am getting following error message in my email from Paypal -
=========================================================
Hello Darryl Grayson ,

Please check your server that handles PayPal Instant Payment Notifications (IPN). IPNs sent to the following URL(s) are failing:

www.kidpositive.com/index.php?+option=co...pl=component&lang=en

If you do not recognize this URL, you may be using a service provider that is using IPN on your behalf. Please contact your service provider with the above information. If this problem continues, IPNs may be disabled for your account.

Thank you for your prompt attention to this issue.

Thanks,

PayPal
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I am not sure, why I am getting this.
Please let me know on this.

Thanks