Undefined variable: "$fa-var-arrow-circle-o-left"

[majioa]

I've encountered the following error:

SassC::SyntaxError: Error: Undefined variable: "$fa-var-arrow-circle-o-left".
        on line 867 of ../ruby/gems/2.5.0/gems/patternfly-sass-3.59.4/dist/sass/patternfly/_vertical-nav.scss
        from line 148 of ../ruby/gems/2.5.0/gems/patternfly-sass-3.59.4/dist/sass/_patternfly.scss
        from line 2 of app/assets/stylesheets/status-colors.scss
>>     content: $fa-var-arrow-circle-o-left;

   -------------^

It seems that sometime the variable was defined in the package, but later was deleted out there, can you rollback the proper code to define all the variables, for example as follows:

$fa-var-arrow-circle-o-down: "\f01a";                              
$fa-var-arrow-circle-o-left: "\f190";                                               
$fa-var-arrow-circle-o-right: "\f18e";                                              
$fa-var-arrow-circle-o-up: "\f01b";                                                 
$fa-sass-asset-helper: true !default;                    
$fa-font-path: if($fa-sass-asset-helper, "font-awesome/", "../fonts/font-awesome/") !default;
$fa-font-name: "fontawesome-webfont" !default;