Theme Name : StrapPress with bootstrap 4.2

I created child theme using Child Theme Configurator. It created functions.php and style.css, but when I applied new styles in the style.css it did not change anything. Then I went through the source code, there was no style.css from child theme directory, but there was style.min.css.

Currently I changed the style.css name to style.min.css and it works, but this is not the correct way.

Because it gives me another problem like I have one custom template. but it is not showing up in edit page. When I change the style.min.css to style.css it is showing up.

I also created child theme manually. The same problem.