Getting errors in project after installing

[dtdetwiller]

Hi, I am getting this error after installing. I noticed that the error is in a file that can't be edited. Any advice/help would be great, thanks!

While processing files with less (for target web.browser):
   client/lib/semantic-ui/themes/default/globals/site.variables.import.less:412:19: Error evaluating function `unit`: the first argument to unit must be a number. Have you forgotten parenthesis?
   error: Error evaluating function `unit`: the first argument to unit must be a number. Have you forgotten parenthesis?