gulp error

[12:34:29] Using gulpfile /usr/share/nginx/www/cupola/public/theme/theme-2016-cupola/source/gulpfile.js
[12:34:29] Starting 'javascript'...
[12:34:30] Starting 'foundation-sass'...
[12:34:30] Starting 'theme-sass'...
[12:34:30] Finished 'javascript' after 1.07 s
Error in plugin 'sass'
Message:
    scss/_settings.scss
Error: File to import not found or unreadable: util/util
       Parent style sheet: /usr/share/nginx/www/cupola/public/theme/theme-2016-cupola/source/scss/_settings.scss
        on line 42 of scss/_settings.scss
>> @import 'util/util';
   ^

[12:34:30] Finished 'theme-sass' after 41 ms
Error in plugin 'sass'
Message:
    scss/_settings.scss
Error: File to import not found or unreadable: util/util
       Parent style sheet: /usr/share/nginx/www/cupola/public/theme/theme-2016-cupola/source/scss/_settings.scss
        on line 42 of scss/_settings.scss
>> @import 'util/util';
   ^

[12:34:30] Finished 'foundation-sass' after 457 ms
[12:34:30] Starting 'build'...
[12:34:30] Finished 'build' after 48 Îźs