Execute R Script_function not found

I've been using Execute R operator to build forecasting models with no major issue at all.

However today I was trying to use quantregForest() of the package with the same name and keep receiving the same error message:

- could not find function \"quantregForest\""

I've tested the script in R and it runs with no problem.

Can you please shed some light on this.

**Note** Enclosed a mock dataset and process.

Many thanks,
Pedro