Conversion to Dynare 5.4

Good morning,

Can you please help me understand how the steady state file needs to be modified when switching to v 5.4? This .mod file below runs normally on Dynare 4.5 but gives me an error message on 5.4.

Many thanks
model.mod (5.0 KB)
model_steadystate.m (3.5 KB)

model_steadystate.m (3.0 KB)