@thentangler I do not have a consitant guide how to obtain the batch log. You should check out some threads in the forum about that.
Currently I would assume the problem might be with the R lubridate library. What version of R are you using?
You could try and use the community R nodes, but that would mean you have to have R with Rserve running when knime is being started. Never tried that with a batch system.