Thank you for your reply.
First of all, i have read here that infinite scrolling is not working with the latest version of views.
https://toolset.com/forums/topic/infinite-scroll-is-not-working-on-view-1-12/
And i have tested on my website, it does not work.
So i change the way to show my child post by using pagination.
I have 2 custom post type: Quote Author, Quotes
Parent: Quote Author
Child: Quotes
So, on the individual Quote Author page, in this case Albert Einstein is the quote author. So the Permalink structure is ..../quote-author/albert-einstein
On this page, i want to display all the quotes by Albert Einstein. So in the view, i have the post relationship filter applied.
And i set the Pagination enabled with manual transition, Pagination updates the entire page.
Then i insert [wpv-pagenavi] into the filter control. Like below:
[wpv-filter-start hide="false"]
[wpv-filter-controls][wpv-pagenavi][/wpv-filter-controls]
[wpv-filter-end]
The end result is shown in the first post image.
I have done everything just like in the manual.
when i click on the page 2, or 3 --> ..../quote-author/albert-einstein/page/2
it will be redirect back to the .../quote-author/albert-einstein/
So, the pagination is not working.
I have tested the same view in the new Page i created. It worked like charm.
But when i tested in a new Post, it gives the same problem as in the Custom Post Type.
I hope you understand what is the problem. And please help me.