Hello Kausar,
Thank you for your reply. I’ve managed to solve the issue;
The problem is I can’t have the theme applied to my existing blogroll page, by following your documentation:
- I edit my “Blog” page and select one of the Blog Template from the Page Attributes
- I go to the Customizer and Set the “Blog” page as Posts page
What I did was; create a new page and select the Blog Template from the Page Attributes, then I selected the new page as the Posts page.
CMIIW, it seemed that the steps mentioned in the documentation cannot be applied to existing page.