It seems to have to do with some form of memory limit of the R session, but I cannot figure out:
1. Which parameter needs to be adjusted here
2. Why any sane person would setup an R session with only 2 GB of memory in the first place

To add insult to injury it says this:

Alternatively if I try to write it as RDS I get this error:

Error in saveRDS(get(object), file = file_path): error writing to connection

To get closer to the error:

There is same mystical size limit.