The following code from here, worked at around 11am. I refreshed my local R env tried from the RPrototyping Lab VRE and tried with a new token. Thanks for any feedback.

rm(list = ls())

Using Data Miner with R¶

source("http://svn.research-infrastructures.eu/public/d4science/gcube/trunk/data-analysis/RConfiguration/RD4SFunctions/workspace_interaction.r")
#SETTING USERNAME AND TOKEN - NOT NEEDED WHEN USING RSTUDIO ON THE PORTAL
username<<-"largesi"
token<<-"1ba80d8d-15ea-4ff1-9420-f8c97ea15d40-843339472" #YOUR TOKEN FOR A VRE
a<-listHomeWS() #GET THE LIST OF FOLDERS IN THE WS ROOT

CONSOLE ERROR MESSAGE:
Retrieving the list of folders and files in /Home/largesi/Workspace
Space required after the Public Identifier
SystemLiteral " or ' expected
SYSTEM or PUBLIC, the URI is missing
Opening and ending tag mismatch: hr line 9 and body
Opening and ending tag mismatch: body line 4 and html
Premature end of data in tag html line 2
Error: 1: Space required after the Public Identifier
2: SystemLiteral " or ' expected
3: SYSTEM or PUBLIC, the URI is missing
4: Opening and ending tag mismatch: hr line 9 and body
5: Opening and ending tag mismatch: body line 4 and html
6: Premature end of data in tag html line 2