R520 not booting General Protection Fault 13 UEFI0011

This system was working perfect with ESXi and was simply rebooted during maint window.

Now it fails to boot - at all.

Errors and system inventory below. 

Dell R520

Drac:  Integrated Dell Remote Access Controller 2.30.30.30 (Build 50)

Inventory:
Dell R520:

Integrated Dell Remote Access Controller 2.30.30.30
Broadcom Gigabit Ethernet BCM5720 - 7.10.64
Broadcom Gigabit Ethernet BCM5720 - 7.10.64
BIOS 2.4.2
PERC H710 Mini 21.3.2-0005
Disk 0 in Backplane 1 of Integrated RAID Controller 1 PA09 - ST2000NM0011
Disk 1 in Backplane 1 of Integrated RAID Controller 1 PA09 - ST2000NM0011
Backplane 1 1.00
Lifecycle Controller 2.30.30.30
Dell 64 Bit uEFI Diagnostics, version 4247, 4247A1, 4247.2 4247A1
Dell OS Driver Pack, 15.07.07, A00 15.07.07
OS COLLECTOR 1.1, OSC_1.1, X10-00 OSC_1.1
System CPLD 1.0.2

Initializing firmware interfaces... 
Initialization complete.

Disconnecting UEFI drivers. Please wait...
ERROR:

- OR -

ERROR: Sometimes SOL serial console gives:

Exception Inside the Exception Handler
Type: General Protection Fault (13) Source: Software (UEFI0011)
AX=0000000000000000 BX=0000000000000000 BP=00000000CCA85768 SP=00000000CCA85630
CX=0000000000000008 DX=0000000000000040 R8=0000000000000000 R9=0000000000000008
SI=AFAFAFAFAFAFAFAF DI=AFAFAFAFAFAFAFAF SS=0018 CS=0038 Flags=00010202
IP=00000000CCADA55D

- OR -

ERROR: Sometimes during boot there is this message:

FW could not sync up config/prop changes for sme of the VD's/PD's
Press any key to continue, or 'C' to load the configuration utility.

(this can be bypassed and continues to boot but it still hangs at:
Disconnecting UEFI drivers. Please wait...

-