Learndash PayPal IPN url

Hi all,

I am hoping someone can help.

We are setting up a learndash site for a client and have entered in his PayPal email for course payments. However, when we test the payment, we keep getting an invalid IPN email and the test user does not get registered to the course.

Can someone please advise what the PayPal Notify URL should be set to in the learndash settings and/or the PayPal IPN settings in their PayPal account

If the issue is seperate to the PayPal IPN URL, any advise & guidance would be awesome

Ta heaps in advance.