subcategories and active categories not showing

Hello everyone

i am using oneline-lite theme.

my problem :
{
“subcategories and active categories not showing” and “the color of the active category/subcategory would change that show its an active category/subcategory )”.

for example :
A (category)
a1(subcategory)

it would look like this :
A
–a1

but it doesn’t???!!!
}

any help is appreciable

thanks a lot in advance ??