Remove category prefix from blog category

[ Moderator note: moved to Fixing WordPress. ]

Hi,

My wordpress site https://domain.com/rstar/ and my blog link https://domain.com/rstar/blog/

when i click a category it looks like https://domain.com/rstar/blog/category/business and click on particular post it looks like https://domain.com/rstar/blog/hi-friends

I have set the custom permalink as https://domain.com/rstar/blog/%postname%/.

I want to just remove the category prefix from https://domain.com/rstar/blog/category/business

Please help me.