Lightroom Classic freezes, and panics my iMac soon after going into "Develop" mode.

[defaultvesdr78c7pvn]

Lightroom Classic freezes and panics my iMac soon after going into "Develop" mode.  Some times the app u.i. green goes green (doesn't occur in Library mode).  It's unusable.

iMac (Retina 5K, 27-inch, Late 2015)  10.15.7 (19H524)

Adobe Lightroom ver 10.1.1 - put t Lightroom in “Develop” mode, Lightroom freezes and the iMac panics soon thereafter.  

panic(cpu 1 caller 0xffffff7f88697ad5): userspace watchdog timeout: no successful checkins from com.apple.WindowServer in 120 seconds

service: com.apple.logd, total successful checkins since load (23460 seconds ago): 2347, last successful checkin: 0 seconds ago

service: com.apple.WindowServer, total successful checkins since load (23430 seconds ago): 2331, last successful checkin: 120 seconds ago

Backtrace (CPU 1), Frame : Return Address

0xffffffa3d81a3720 : 0xffffff800751963d 

0xffffffa3d81a3770 : 0xffffff8007653ae5 

0xffffffa3d81a37b0 : 0xffffff800764566e 

0xffffffa3d81a3800 : 0xffffff80074bfa40 

0xffffffa3d81a3820 : 0xffffff8007518d07 

0xffffffa3d81a3920 : 0xffffff80075190f7 

0xffffffa3d81a3970 : 0xffffff8007cc0238 

0xffffffa3d81a39e0 : 0xffffff7f88697ad5 

0xffffffa3d81a39f0 : 0xffffff7f886977fa 

0xffffffa3d81a3a10 : 0xffffff8007c520de 

0xffffffa3d81a3a60 : 0xffffff7f88696cfe 

0xffffffa3d81a3b60 : 0xffffff8007c5b303 

0xffffffa3d81a3ca0 : 0xffffff80076025e2 

0xffffffa3d81a3db0 : 0xffffff800751f3a8 

0xffffffa3d81a3e10 : 0xffffff80074f5d35 

0xffffffa3d81a3e70 : 0xffffff800750cb02 

0xffffffa3d81a3f00 : 0xffffff800762b065 

0xffffffa3d81a3fa0 : 0xffffff80074c0226 

      Kernel Extensions in backtrace:

         com.apple.driver.watchdog(1.0)[70ED0B51-E234-3CFD-86E4-52240E3D0507]@0xffffff7f88696000->0xffffff7f8869efff

BSD process name corresponding to current thread: watchdogd

Mac OS version:

19H524

Kernel version:

Darwin Kernel Version 19.6.0: Tue Jan 12 22:13:05 PST 2021; root:xnu-6153.141.16~1/RELEASE_X86_64

Kernel UUID: 64F23D6D-4C30-3FC4-B7C2-9EE0BBA0D29A

Kernel slide:     0x0000000007200000

Kernel text base: 0xffffff8007400000

__HIB  text base: 0xffffff8007300000

System model name: iMac17,1 (Mac-65CE76090165799A)

System shutdown begun: NO

Panic diags file available: YES (0x0)

{Moved from Lightroom Cloud to Lightroom Classic Forum by Moderator} 

[defaultvesdr78c7pvn]

Please refund my monthly $ubscribtion fee until this bug is fixed.