variable @wi-css-prefix is undefined on line 1 in file '/Content/icons/weather-icons/less/mappings/wi-wmo4680.less':
   []: /beginning of file
  [1]: .@{wi-css-prefix}-wmo4680-0:before,
       -^
  [2]: .@{wi-css-prefix}-wmo4680-00:before       { content: @thermometer           ; }