The first value is a dropdown option and the second value is a blank date. Everything I've tried thus far doesn't work with the blank date.
This works =COUNTIFS({DefectStatus}, ="Assigned")
This does not work =COUNTIFS(AND({DefectStatus}, ="Assigned", ISBLANK(TargetCloseDate)))
This does not work =COUNTIFS(AND({DefectStatus}, ="Assigned", ISBLANK{TargetCloseDate}))
Note - DefectStatus and TargetCloseDate are defined ranges