Thank you! That fixed the problem. But now it gave me another one! 
All i'm trying to do is make a copy of the elemental theme so I can actually edit the CSS and stuff. ._.
                No grid framework found. Grid area methods require a valid grid framework defined in a PageTheme class.
All i'm trying to do is make a copy of the elemental theme so I can actually edit the CSS and stuff. ._.
                        Do you have $pThemeGridFrameworkHandle set in your page_theme.php?
Example:
                    
                Example:
protected $pThemeGridFrameworkHandle = 'bootstrap3';
                        Yes sir, I do. I'm not sure if its right however.
File attached.
                protected $pThemeGridFrameworkHandle = 'bootstrap3';
File attached.
                    
You have to change the path of the mixins.less import in main.less.
This is the path to main.less:
themes\elemental\css\main.less
In main.less change:
to