Have you tried the incremental update to 1.16 then 1.18 and finally the 1.22?
Also did you tried the F12 method by file on USB drive, described by Dell installation description?
Independent OS updates is always the best choice… not OS environment.
EDIT: F12 with the 1.3.1 also fails?
Im not pointing an ME FW image corruption at this point, from your dump.
Clear/take out the CMOS battery, leave it without power 15m, boot to a USB with Intel CSTXE from package tools v4r6, EFI boot version tool of the FPT and run fpt -greset, this will re-initiailize the CSTXE engine FW, then try again the flash.