"Set the font-family of the h1 element to 'Shift', sans-serif" error in Make a Website: CSS Styling


Hi guys, first time here, have an issue with CSS Styling. This is my code I have in

.jumbotron h1 {
font-weight: Bold;
font-family:'Shift', sans-serif;

But it still keeps coming back with

Set the font-family of the h1 element inside

to 'Shift', sans-serif

Ive changed it so many times put the font-family to the top, middle, left out the semicollan etc even emptied the cache to see would that help. Am about to put my fist through the screen at this stage, please help

Font-family:'Shift', sans-serif