Default excerpt

Using Hemingway Theme
Showing full post text instead of excerpt on Home.
I’ve tried putting
function mytheme_custom_excerpt_length( $length ) {
return 55;
}
add_filter( ‘excerpt_length’, ‘mytheme_custom_excerpt_length’, 999 );

in function functions.php without any effect

I cleared my cache.

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