Can a plaintiff maintain a cause of action for failure to prevent harassment?

A failure to prevent discrimination claim is a derivative claima plaintiff cannot maintain a cause of action for failure to investigate or prevent harassment unless there was actionable harassment. (See Trujillo v. North County Transit Dist . (1998) 63 Cal.App.4th 280, 289, 73 Cal.Rptr.2d 596 ; Dickson v. Burke Williams, Inc . (2015) 234 Cal.App.4th 1307, 13131314, 184 Cal.Rptr.3d 774.) Plaintiffs' failure to provide the necessary evidence to support their discrimination claim necessarily dooms their failure to prevent discrimination claim.