xreg error with auto.arima method in train_model function

[VitoFanelli]

I get this error when using xreg in auto.arima and nnetar method

Error in [.data.frame(xreg_train, , arg$xreg) : undefined columns selected

Below a reproducible example. Thanks.
xreg_arima_problem.txt

[kaes98]

Hi, Did you make it work?