Alright, we are going to try the method from the Annex section of this article (bottom of this first post) by Fernando of MDL:
https://www.win-raid.com/t455f16-Guide-H...-BIOS.html
The files for Step 1 can be found at the bottom of the first post that contains the article ("Flashrom v1.2 Utilities.rar"). Ignore steps 8 and 9, as I have performed the relevant edits already. You can skip steps 6 and 7 as well, but more backups never hurt anyone.
Let me know if you need further assistance with this or if you encounter another error.
!!!!!PLEASE READ!!!!!! Our Ukrainian friends are undergoing atrocities right now and need support. There are two things you can do for starters:
1.) Donate to one of various organizations offering medical, military, and psychological support to those impacted:
Support Organizations
2.) Combat misinformation on social media.
Also, please feel free to PM me if I have not replied again about your BIOS mod request after 5 days.