The selected file /tmp/filemB5gQv could not be uploaded, because the destination sites/default/files/css/css_a91cd284035e73ba34d112bfed2f5a16.css is not properly configured.
  The selected file /tmp/filerd73dB could not be uploaded, because the destination sites/default/files/css/css_de1aa27776f1462d2b0d83a80ce4b92d.css is not properly configured.

Check this box to log all users who changed the Field, with the time and the new value (the “audit history” of the Field).

Check this box to enable an icon on the Field which users can then click to reveal the audit history of the Field.

When this box is checked, this Field will always display in view mode, regardless of its layout's mode. When this box is checked, a select Field appears, allowing you to specify whether the value that is shown in this Field is saved when its parent Layout saves. The “Save” option is generally used when a default value will be used in add mode which the user will not be allowed to change. The “Don't Save” option should be used when the Field is set by actions on other Fields (e.g. an “Extended Price” Field is calculated by a “Unit Price” Field and a “Quantity” Field. If the “Extended Price” Field were saved after the actions to calculate it were run, the value which was displayed before page save would overwrite the value which the actions just set).

Check this box to make the Field required. Additional pre-save validations can be entered through the Action Manager.

When this Field appears in “add mode”, you have the ability to place a value in the Field automatically, saving the user the trouble of obvious, intended or redundant data entry. Use the Expression Builder to produce static or data driven content for this Field, when it appears in add mode.