I'm not sure whos side the error originates from but when tested on a clean install, with only mffs (5.1.18) (specifically the version by QueenOfMissiles, idk what the other one is) and AAA Particles (1.4.10), all item textures in a players hand are missing, as well as the texture of your first person hand (in screenshot my skin texture isn't black normally btw). If it turns out to be on their end I'll open an issue there instead.
1.20.1 Forge
latest.log
I'm not sure whos side the error originates from but when tested on a clean install, with only mffs (5.1.18) (specifically the version by QueenOfMissiles, idk what the other one is) and AAA Particles (1.4.10), all item textures in a players hand are missing, as well as the texture of your first person hand (in screenshot my skin texture isn't black normally btw). If it turns out to be on their end I'll open an issue there instead.
1.20.1 Forge
latest.log