The selected file /tmp/filex77Gnd could not be uploaded, because the destination sites/default/files/css/css_a91cd284035e73ba34d112bfed2f5a16.css is not properly configured.
  The selected file /tmp/file1rOH37 could not be uploaded, because the destination sites/default/files/css/css_de1aa27776f1462d2b0d83a80ce4b92d.css is not properly configured.

Check this box to disregard any security passed to the Layout and use the Layout securities specified in the “Layout Security” Layout below (See also Layout Security).

Define securities for this Layout. These will be used only if the “Enable Layout Security” option is checked (See also Layout Security).