Thank you, now it’s working!
This doesn’t fix the problem. Still getting error, but now on line 773:
Fatal error: Can’t use function return value in write context in /home2/algyogy/public_html/kurtiandi.com/wp-content/plugins/fruitful-shortcodes/includes/shortcodes/shortcodes.php on line 773
Problem isn’t fixed for me nor with the github code, nor with the if(get_the_excerpt()== false)..