Unable to use %r intrepreter

Hi Team,

I  am not able to use R interpreter getting below errors "Prefix not found" or "Interpreter not found"

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%r
foo <- TRUE
print(foo)
bare <- c(1, 2.5, 4)
print(bare)
double <- 15.0
print(double)

Output: Prefix not found

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Please let me know how can i proceed.

Regards
Amit
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