Where did you find the TWRP version 3.2.1-1, could you share the link? Please.:fingers-crossed:
Another great work made by klabit87...
I also have that problem after i flashed official crgb firmware. Tried several times but without luck.
So which firmware are you on?
today I installed the lastest firmware I found (G955FXXS3CRG1) and the standard tweak worked like a charm!...