In boostrap default/less distribution package, fonts are stored on path './font/' but in sass package path is './font/bootstrap/'
so to fix that issue the generateCssFrameworkBootstrap.js file is updated to generate different path for fonts file in case of sass processor.
or you can follow the other solution 2
update line no 83 in "megaboilerplate\generators\css-framework\modules\bootstrap\sass\bootstrap\_variables.scss"
$icon-font-path: if($bootstrap-sass-asset-helper, "bootstrap/", "../fonts/bootstrap/") !default;
with
$icon-font-path: if($bootstrap-sass-asset-helper, "bootstrap/", "../fonts/") !default;
so to fix that issue the generateCssFrameworkBootstrap.js file is updated to generate different path for fonts file in case of sass processor.
or you can follow the other solution 2