@gerardo_alpe89 welcome to the KNIME forum. Problems of this sort with the R view pop up sometimes on the KNIME forum.
As of now there was no real solution other than that this problem sometimes disappear as recently as here where the Mac version seems to be affected @carstenhaubold .
@armingrudd there are pretty standard R libraries that do not seem to work properly. And they have done so in the past (my impression). It seems that the output is not properly captured. The community node does not have the same problems.
In this example a simple plot does work, others do not. GGplot2 is a pretty common library.
My “solution” usually was to use python or the R community nodes.
If you want to learn about those and check your R installation and make sure you have all packages you can refer to this article:
TL;DR: KNIME and R/RStudio are great working together, a few hints like employing conda might make their cooperation even better
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