variable @wi-css-prefix is undefined on line 1 in file '/Content/icons/weather-icons/less/mappings/wi-forecast-io.less':
   []: /beginning of file
  [1]: .@{wi-css-prefix}-forecast-io-clear-day:before            { content: @day-sunny     ; }
       -^
  [2]: .@{wi-css-prefix}-forecast-io-clear-night:before          { content: @night-clear   ; }