Cannot run livy in sparkR mode on zeppelin 0.8 - apache-spark

Question

We've install the zeppelin that is one of HDP 3.1.5 service and install the suitable R version (from RHEL 7 repos) that compatible with the zeppelin version (0.8).
At first, when we scripting and running the Spark code using spark interpreter especially using sparkR one, it runs well but when we change the interpreter into livy, we always got an error with message "Fail to start interpreter".
When we check into Yarn UI, the application is created and running but when it's checked into spark ui, we've got the stderror that said
22/07/28 10:21:17 WARN SparkRInterpreter$: Fail to init Spark RBackend, using different method signature
java.lang.ClassCastException: scala.Tuple2 cannot be cast to java.lang.Integer
at scala.runtime.BoxesRunTime.unboxToInt(BoxesRunTime.java:101)
at org.apache.livy.repl.SparkRInterpreter$$anon$1.run(SparkRInterpreter.scala:88)
22/07/28 10:21:17 WARN Session: Fail to start interpreter sparkr
java.io.IOException: Cannot run program "R": error=2, No such file or directory
at java.lang.ProcessBuilder.start(ProcessBuilder.java:1048)
at org.apache.livy.repl.SparkRInterpreter$.apply(SparkRInterpreter.scala:143)
at org.apache.livy.repl.Session.liftedTree1$1(Session.scala:107)
at org.apache.livy.repl.Session.interpreter(Session.scala:98)
at org.apache.livy.repl.Session$$anonfun$execute$1.apply$mcV$sp(Session.scala:168)
at org.apache.livy.repl.Session$$anonfun$execute$1.apply(Session.scala:163)
at org.apache.livy.repl.Session$$anonfun$execute$1.apply(Session.scala:163)
at scala.concurrent.impl.Future$PromiseCompletingRunnable.liftedTree1$1(Future.scala:24)
at scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:24)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.io.IOException: error=2, No such file or directory
at java.lang.UNIXProcess.forkAndExec(Native Method)
at java.lang.UNIXProcess.<init>(UNIXProcess.java:247)
at java.lang.ProcessImpl.start(ProcessImpl.java:134)
at java.lang.ProcessBuilder.start(ProcessBuilder.java:1029)
... 11 more
Is there any step/configuration that we skip?
-Thanks-