How to correctly complete an HTTP request?

Question

AJAX

How to fix it?
Of course, I see the path and so on, but I can’t find it in the file, I’m new and this landing is generally copied.
Could you leave your discord so that I can contact you and discuss this (I will be very grateful and grateful).

Answer 1

HTTP 2xx
In general, your page /system/ajaxdoes not exist