Error using InMemoryPipe class in Zingg Python API: ClassNotFoundException for inMemory data source

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Py4JJavaError                             Traceback (most recent call last)
Cell In[45], line 1
----> 1 zingg.initAndExecute()

File /usr/local/lib/python3.9/dist-packages/zingg/client.py:54, in Zingg.initAndExecute(self)
     52 """ Method to run both init and execute methods consecutively """
     53 self.client.init()
---> 54 self.client.execute()

File /usr/local/lib/python3.9/dist-packages/py4j/java_gateway.py:1304, in JavaMember.__call__(self, *args)
   1298 command = proto.CALL_COMMAND_NAME +\
   1299     self.command_header +\
   1300     args_command +\
   1301     proto.END_COMMAND_PART
   1303 answer = self.gateway_client.send_command(command)
-> 1304 return_value = get_return_value(
   1305     answer, self.gateway_client, self.target_id, self.name)
   1307 for temp_arg in temp_args:
   1308     temp_arg._detach()

File /spark/python/pyspark/sql/utils.py:111, in capture_sql_exception.<locals>.deco(*a, **kw)
    109 def deco(*a, **kw):
    110     try:
--> 111         return f(*a, **kw)
    112     except py4j.protocol.Py4JJavaError as e:
    113         converted = convert_exception(e.java_exception)

File /usr/local/lib/python3.9/dist-packages/py4j/protocol.py:326, in get_return_value(answer, gateway_client, target_id, name)
    324 value = OUTPUT_CONVERTER[type](answer[2:], gateway_client)
    325 if answer[1] == REFERENCE_TYPE:
--> 326     raise Py4JJavaError(
    327         "An error occurred while calling {0}{1}{2}.\n".
    328         format(target_id, ".", name), value)
    329 else:
    330     raise Py4JError(
    331         "An error occurred while calling {0}{1}{2}. Trace:\n{3}\n".
    332         format(target_id, ".", name, value))

Py4JJavaError: An error occurred while calling o874.execute.
: zingg.client.ZinggClientException: Could not read data.
	at zingg.util.PipeUtil.read(PipeUtil.java:93)
	at zingg.util.PipeUtil.readInternal(PipeUtil.java:100)
	at zingg.util.PipeUtil.readInternal(PipeUtil.java:143)
	at zingg.util.PipeUtil.read(PipeUtil.java:166)
	at zingg.TrainingDataFinder.execute(TrainingDataFinder.java:53)
	at zingg.client.Client.execute(Client.java:242)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at py4j.reflection.MethodInvoker.invoke(MethodInvoker.java:244)
	at py4j.reflection.ReflectionEngine.invoke(ReflectionEngine.java:357)
	at py4j.Gateway.invoke(Gateway.java:282)
	at py4j.commands.AbstractCommand.invokeMethod(AbstractCommand.java:132)
	at py4j.commands.CallCommand.execute(CallCommand.java:79)
	at py4j.GatewayConnection.run(GatewayConnection.java:238)
	at java.lang.Thread.run(Thread.java:750)
Caused by: java.lang.ClassNotFoundException: Failed to find data source: inMemory. Please find packages at http://spark.apache.org/third-party-projects.html
	at org.apache.spark.sql.execution.datasources.DataSource$.lookupDataSource(DataSource.scala:692)
	at org.apache.spark.sql.execution.datasources.DataSource$.lookupDataSourceV2(DataSource.scala:746)
	at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:265)
	at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:225)
	at zingg.util.PipeUtil.read(PipeUtil.java:85)
	... 16 more
Caused by: java.lang.ClassNotFoundException: inMemory.DefaultSource
	at java.net.URLClassLoader.findClass(URLClassLoader.java:387)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
	at org.apache.spark.sql.execution.datasources.DataSource$.$anonfun$lookupDataSource$5(DataSource.scala:666)
	at scala.util.Try$.apply(Try.scala:213)
	at org.apache.spark.sql.execution.datasources.DataSource$.$anonfun$lookupDataSource$4(DataSource.scala:666)
	at scala.util.Failure.orElse(Try.scala:224)
	at org.apache.spark.sql.execution.datasources.DataSource$.lookupDataSource(DataSource.scala:666)
	... 20 more