Categories not showing posts

Hi,

Ive been reading all the articles related to this issue and i couldnt find the fix for my issue, I am a newbie and i am creating a webpage using the MasterStudy template, but everytime i click on a category to see related posts I got nothing, I know little about coding so it is hard for me to see what is the issue.. a little guide might help. thanks.
Just want to let you know that it does works with other themes.

thats my site.

thank you