"When 'Covariates' are used in the model, predictions cannot be carried out unless the covariates are also observed for the predicted period." What does this mean?
This means your covariates need to be of the same length of time as your main predictor variables or the time series analysis cannot run. Everything needs to have been measured in the same way (i.e., same period of time). This is my understanding of the error message, but if you want to learn more, I suggest heading over to the JASP forums to ask about it.
"When 'Covariates' are used in the model, predictions cannot be carried out unless the covariates are also observed for the predicted period."
What does this mean?
This means your covariates need to be of the same length of time as your main predictor variables or the time series analysis cannot run. Everything needs to have been measured in the same way (i.e., same period of time). This is my understanding of the error message, but if you want to learn more, I suggest heading over to the JASP forums to ask about it.