Failed Reading BIOS Signature File HP Pavilion x360 - 11m-ap0013dx

[brandom]

Hello, I am trying to get this laptop HP Pavilion x360 - 11m-ap0013dx out of a BIOS update loop. So far, I've tried every BIOS update available on HP's website up to F.05 since I can't get F.02 or F.01 to run on my machine. I can't seem to get the laptop passed the BIOS signature verification.

Here's a piece of the log file:
2018-01-02 01:39:46  EFI HP BIOS Update 3.8.0.0 Started
2018-01-02 01:39:46  [L]> System ID: Type
2018-01-02 01:39:46  HP BIOS Image Interface Protocol Version 2.0
2018-01-02 01:39:46  [L]> EFI_HP_BATTERY_CONTROL_PROTOCOL_2010 is present.
2018-01-02 01:39:46  [L]> Found 2 Absolute Pointer Protocol(s)
2018-01-02 01:39:47  [L]> 0 UART device path node found.
2018-01-02 01:39:47  All Required Protocols Located
2018-01-02 01:39:47  HpBiosUpdate.Mode = 4
2018-01-02 01:39:47  Current Directory = HP\BIOSUpdate\
2018-01-02 01:39:47  [L]> System ID: Type
2018-01-02 01:39:47  SMBIOS Init Success
2018-01-02 01:39:47  SystemFamily = 2
2018-01-02 01:39:47  [L]> PlatformLang reported as en-US.
2018-01-02 01:39:47  [L]> Language Selected is currently (eng).
2018-01-02 01:39:47  Starting BIOS Update Process
2018-01-02 01:39:47  Setting BIOS Update Token
2018-01-02 01:39:47  Getting BIOS Detail Information
2018-01-02 01:39:47  BIOS Returned BiosID '085C1'
2018-01-02 01:39:47  Loading BIOS Image
2018-01-02 01:39:47  File name constructed: HP\BIOS\Current\085C1.bin
2018-01-02 01:39:48  Reading New BIOS Image HP\BIOS\Current\085C1.bin
2018-01-02 01:39:48  Getting BIOS version from file image
2018-01-02 01:39:48  Bios Version = F.05
2018-01-02 01:39:48  Verifying AC or Battery Power Status
2018-01-02 01:39:48  Verifying Binary match
2018-01-02 01:39:48  Loading Signature File
2018-01-02 01:39:48  Failed Reading BIOS Signature File HP\BIOS\Current\085C1.sig
2018-01-02 01:39:48  Failed Reading .sig file. (Not Found)

The date on the left side is wrong but everything else is being logged correctly since it's showing on the flash drive I'm trying to flash it with. When I check the path it is referring to, I see the 085C1.bin and 085C1.s12 files but not 085C1.sig file. 
Is there a way to generate the 085C1.sig file or find it somewhere else? So far, all my Googling hasn't returned much results. Any help is appreciated!