I'm turn on Energy, Viscosity to Laminar , Species Transport to Species Transport (Volumetric) and SOFC with unresolved electrolyte addon module.

In SOFC, there is a mixture I can add fluid into through the material option. I add Methane , CO and CO2. and Go to the mixture > Names> add the fluid and put N2 as last species. Then, the system crash once I try to apply