The image above shows Quilt Loader 0.18.10 crashing.
I’m not sure why this happens. I just got Quilt and was stoked to hear that it supports Fabric mods, as a past Fabric user. I mainly got it so I could use the mod LambdasBetterGrass. I have Quilted Fabric API (QFAPI) / Quilt Standard Libraries (QSL) installed with the normal Fabric API taken out of the mods folder.