HI i am having repated kernal pannic on imac can some help read this report

panic(cpu 1 caller 0xffffff8013b79941): userspace watchdog timeout: no successful checkins from WindowServer in 120 seconds

WindowServer has not exited since first loaded

service: logd, total successful checkins in 352 seconds: 36, last successful checkin: 0 seconds ago

service: WindowServer, total successful checkins in 320 seconds: 20, last successful checkin: 120 seconds ago

service: opendirectoryd, total successful checkins in 352 seconds: 35, last successful checkin: 0 seconds ago

service: configd, total successful checkins in 352 seconds: 35, last successful checkin: 0 seconds ago

Panicked task 0xffffff9b5edd68b8: 3 threads: pid 92: watchdogd

Backtrace (CPU 1), panicked thread: 0xffffffa4f6ec5b30, Frame : Return Address

0xfffffff597f735a0 : 0xffffff801086e4fd 

0xfffffff597f735f0 : 0xffffff80109c30a4 

0xfffffff597f73630 : 0xffffff80109b2b29 

0xfffffff597f73690 : 0xffffff801080e951 

0xfffffff597f736b0 : 0xffffff801086e7dd 

0xfffffff597f737a0 : 0xffffff801086de87 

0xfffffff597f73800 : 0xffffff8010fdc413 

0xfffffff597f738f0 : 0xffffff8013b79941 

0xfffffff597f73900 : 0xffffff8013b795dc 

0xfffffff597f73920 : 0xffffff8013b786b9 

0xfffffff597f73a50 : 0xffffff8010f5418e 

0xfffffff597f73bb0 : 0xffffff801096f639 

0xfffffff597f73cc0 : 0xffffff801084875a 

0xfffffff597f73d60 : 0xffffff801085f4a2 

0xfffffff597f73dd0 : 0xffffff801085fb27 

0xfffffff597f73ef0 : 0xffffff80109983a3 

0xfffffff597f73fa0 : 0xffffff801080edb6 

      Kernel Extensions in backtrace:

         com.apple.driver.watchdog(1.0)[BD08CE2D-77F5-358C-8F0D-A570540A0BE7]@0xffffff8013b77000->0xffffff8013b79fff

This happens every 30mins to 1 hrs in normal mode.

Mac will restart on its own. Sometimes properly, other time with half blue screen during apple logo and screen turns off/black.

In safe mode also same but it restarts properly. screen will be like blue contrast but then returns to original.

Also recently i had switched from hdd to ssd (don't think its because of this)

IMac details - 4k 21.5inch 2017

3GHz Intel Core i5

Radeon pro 555 2GB

8GB 2400MHz .

Please someone help me figure whats wrong.

Did all the resets.

System hardware diagnoses shows no faults.