Could you please elaborate? I believe this is the newest version for a 1.16.5 Modpack (excluding the daily release, that is to say latest stable release)
https://pastebin.com/8f1C09DV
I have update forge to version 1.16.5 - 36.2.20 ; still getting the same problem (or perhaps its a new but simular problem?)
I have also tried launching forge through the normal launcher, and it starts fine.