Samsung N950N read cert diag error

Searching Samsung modem... detected COM26
Reading phone info...
Model: SM-N950N
AP version: FA71_N950NKSU4ARH1
CSC version: NONE
CP version: N950NKOU4ARH1
Phone SN: 00000000000
IMEI: 357841091149563
Unique number: CE10171A50F56C4F0B7E
Searching Samsung diag port... detected COM9
Reading phone info... error (0)
Check phone connection or KNOX WARRANTY VOID is 0x1
Done with Samsung Tool PRO v.34.11
but knox is not void 0x0