Unexpected Error in PROC IML

[USP2405]

I have executed below code in SAS Studio using SAS Viya but getting error . Please help me to resolve this issue.

proc iml;
submit / R;
library(ggplot2)
library(rtf)
library(stringr)
endsubmit ;

ERROR: R:  unexpected '/' in "/"

statement : SUBMIT at line...

[Rick_SAS]

Please submit the following statements and post the log:

%put &SYSVLONG4;
proc options option=RLANG value;
run;

proc iml;
submit / R;
x <- 1
print(x)
endsubmit ;
quit;