kernel panic upload mode sm-g611f

when i try to patchcert device got error (Kernal panic upload mode)
and chimera

Patch certificate started
Unable to detect IMEI number.
Gathering phone info...
Collecting information. Be patient! Do NOT disconnect the phone!
Model: SM-G611F
Sales Code: unknown
Timezone: Asia/Karachi
Android Version: 8.0.0 [R16NW] [SDK 26]
Build Date: Fri Sep 28 21:29:08 KST 2018
PDA Version: G611FXXU1BRI6 [september 2018, rev6]
Phone Version: G611FDDU1ARE1 [may 2018, rev1]
Board Platform: EXYNOS5
Modem Platform: SHANNON315
Serial Number: R58K60VEHHX
Battery Status: 4.15V (83%)
Network Type: GSM
SIM Status: READY,READY
Multisim Config: DSDS
Knox Version: v30
Warranty Bit: 1
Security Patch: 2018-10-01
Data Encryption State: encrypted
Preparing...
Checking current patchcert.
Checking modem.
Checking root.
The phone is rooted by: Chimera SU v1.0
Checking boot image. Be patient! Do NOT disconnect the phone!
Writing boot image.
Restarting phone.
Waiting for ADB connection. Be patient! Do NOT disconnect the phone!
Reading data...
Checking modem version.
Restarting phone.
Waiting for ADB connection. Be patient! Do NOT disconnect the phone!
Reading data. Be patient! Do NOT disconnect the phone!
Patching certificate...
Unable to patch certificate.
Finished at local time: [05.28.19 06:39:52]
WorkID: 60985105