Categories not working

I chose to have my categories displayed in menu 1 to have my posts accessed better, obviously by category. The first day it worked but I logged on a few days later and when i click on the categories in menu 1 the page shows up blank and no longer with my posts of that category. I do not know what happened nothing changed on my end. please help i LOVE this theme but if this can’t be fixed i’ll have to move on

The page I need help with: [log in to see the link]