ID:15308 Invalid device family in project file; close and reopen project to access Device dialog box

CAUSE: The device family in the Quartus Prime Settings File (.qsf) is invalid. You may have edited it outside the Quartus Prime software.

ACTION: Click OK to close the message dialog box. Close the current project and open it again; Quartus Prime allows you to enter a valid device family in the Device page of the Settings dialog box to correct the problem.