Cannot build the timeline in the contextual bandit tutorial

I am currently trying to follow the the [tutorial](https://reagent.ai/rasp_tutorial.html#straight-outta-context). Everything worked fine until I tried to execute the Spark submit command
```
(base) root@262985aeb18b:~/ReAgent# rm -Rf spark-warehouse derby.log metastore_db preprocessing/spark-warehouse preprocessing/metastore_db preprocessing/derby.log ; /usr/local/spark/bin/spark-submit \
> --class com.facebook.spark.rl.Preprocessor preprocessing/target/rl-preprocessing-1.1.jar \
> "`cat serving/examples/ecommerce/training/timeline.json`"

2019-11-29 11:54:37 WARN NativeCodeLoader:62 - Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Warning: Local jar /home/ReAgent/preprocessing/target/rl-preprocessing-1.1.jar does not exist, skipping.
java.lang.ClassNotFoundException: com.facebook.spark.rl.Preprocessor
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:348)
at org.apache.spark.util.Utils$.classForName(Utils.scala:239)
at org.apache.spark.deploy.SparkSubmit$.org$apache$spark$deploy$SparkSubmit$$runMain(SparkSubmit.scala:851)
at org.apache.spark.deploy.SparkSubmit$.doRunMain$1(SparkSubmit.scala:198)
at org.apache.spark.deploy.SparkSubmit$.submit(SparkSubmit.scala:228)
at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:137)
at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)
2019-11-29 11:54:37 INFO ShutdownHookManager:54 - Shutdown hook called
2019-11-29 11:54:37 INFO ShutdownHookManager:54 - Deleting directory /tmp/spark-e105a6c2-15f8-4e11-a21b-98a3a84c38b5
```
I installed ReAgent using Docker (CPU only) on MacOS High Sierra.