g900f impossibile write cert

hi all
i try to write cert on s5 rooted but is impossibile reset msl
somebody have any solution ?
on chimera tool the response is this :

Timezone: Europe/Rome
Android Version: 6.0.1 [MMB29M] [SDK 23]
Build Date: Mon Jan 15 16:53:04 KST 2018
PDA Version: G900FXXU1CRA2 [january 2018, rev2]
Phone Version: G900FXXU1CQK3 [november 2017, rev3]
CSC Version: G900FTIM1CRB1 [february 2018, rev1]
Board Platform: MSM8974
Modem Platform: MSM8974PRO
Serial Number: 00000000000
Battery Status: 4.22V (89%)
Network Type: GSM
SIM Status: ABSENT
Knox Version: v30
Warranty Bit: 1
Security Patch: 2017-08-01
Data Encryption State: unencrypted
Resetting MSL...
Trying on SAMSUNG Mobile USB Serial Port (COM102)
Serial port init failed.
Unable to write certificate.
Finished at local time: [03.13.19 23:03:11]
WorkID: 54692549