Track error on file permission? I get this error when running Status Report:


  CTools CSS Cache  Unable to create
  
  The CTools CSS cache directory, ctools/css could not be created due to a misconfigured files directory. Please ensure that the files directory is correctly configured and that the webserver has permission to create directories.


Where should I look for this folder?
That should be in the base of your site's file directory. Navigate to /admin/config/media/file-system to see where it is configured.