Roughly Enough Items recipe auto-insertion (+) button is broken and always say not enough materials with this mod installed. Tried with only these two mods and default configs.

Versions:
This mod [1.16.x] 1.2.4
MC 1.16.1
REI [Fabric 1.16.x] v4.11.0
Fabric 0.9.1 build 205

This should be fixed thanks to a fix on REI's side :)