SM-G361F write cert failed - SOLVED

Protocol error on rooted phone, any ideas?

Gathering phone info...
Collecting information. Be patient! Do NOT disconnect the phone!
Model: SM-G361F
Sales Code: TMZ
Country Code: CZECH
Timezone: Europe/London
Android Version: 5.1.1 [LMY48B] [SDK 22]
Build Date: Mon Jan 18 10:06:52 KST 2016
PDA Version: G361FXXU1APA2 [january 2016, rev2]
Phone Version: G361FXXU1APA2 [january 2016, rev2]
CSC Version: G361FTMZ1APA1 [january 2016, rev1]
Product Code: SM-G361FZWABTU
HIDSw Version: G361FXXU1APA2/G361FTMZ1APA1/G361FXXU1APA2/G361FXXU1APA2
Board Platform: MRVL
Serial Number: RV8G70BJ5AX
Imei: 351718070828951
Unique Number: CQN00776F9BB382
Connections: AT,MTP
Battery Status: 4.30V (84%)
Network Type: GSM
SIM Status: READY
Knox Version: v30
Warranty Bit: 1
Security Patch: 2016-01-01
Data Encryption State: unencrypted
Checking custom root image...
Present.
Rooting by custom image-based root method...
Flashing firmware...
Switching to download mode.
Waiting for download mode.
Connecting.
Reading PIT from phone.
Flashing boot.img
Restarting phone.
Waiting for ADB connection. Be patient! Do NOT disconnect the phone!
Checking root state...
Rooted.
Writing cert...
Reading and storing secure image.
Reading cookies.
Writing cert...
Initializing RIL.
Testing RIL availability. Be patient! Do NOT disconnect the phone!
Bypassing MSL... Be patient! Do NOT disconnect the phone!
Protocol error.
Unable to write cert.
Finished at local time: [07.16.18 16:18:45]
WorkID: 40869120