Can't get rid of "The steady state has NaNs or Inf."

Hello,
As beginner I was trying to replicate one paper to estimate output gap. But I am getting “The steady state has NaNs or Inf.” error and I am unable to understand why it is happening.
Could you please take a look at the mode file?

Best,
Debojyoti
prod_func_growth_ac.mod (4.4 KB)

Does it need data to run?

Yes. Attached the excel file.
data250223.xlsx (15.9 KB)

Please to provide an exact steady state. Your model is linear but contains some constant terms. You need to properly account for them.