Failed to find any class that implements Connector Mongo and MQTT connectors

[radtech]

I am following this tutorial
[https://www.baeldung.com/kafka-connect-mqtt-mongodb]

But for both i am getting the same error

kafka-connect | [2020-11-27 13:36:50,244] ERROR Uncaught exception in REST call to /connectors (org.apache.kafka.connect.runtime.rest.errors.ConnectExceptionMapper)
kafka-connect | org.apache.kafka.connect.errors.ConnectException: Failed to find any class that implements Connector and which name matches at.grahsl.kafka.connect.mongodb.MongoDbSinkConnector, available connectors are: PluginDesc{klass=class io.confluent.connect.activemq.ActiveMQSourceConnector, name='io.confluent.connect.activemq.ActiveMQSourceConnector', version='5.1.0', encodedVersion=5.1.0, type=source, typeName='source', location='file:/usr/share/java/kafka-connect-activemq/'}, PluginDesc{klass=class io.confluent.connect.elasticsearch.ElasticsearchSinkConnector, name='io.confluent.connect.elasticsearch.ElasticsearchSinkConnector', version='5.1.0', encodedVersion=5.1.0, type=sink, typeName='sink', location='file:/usr/share/java/kafka-connect-elasticsearch/'}, PluginDesc{klass=class io.confluent.connect.hdfs.HdfsSinkConnector, name='io.confluent.connect.hdfs.HdfsSinkConnector', version='5.1.0', encodedVersion=5.1.0, type=sink, typeName='sink', location='file:/usr/share/java/kafka-connect-hdfs/'}, PluginDesc{klass=class io.confluent.connect.hdfs.tools.SchemaSourceConnector, name='io.confluent.connect.hdfs.tools.SchemaSourceConnector', version='2.1.0-cp1', encodedVersion=2.1.0-cp1, type=source, typeName='source', location='file:/usr/share/java/kafka-connect-hdfs/'}, PluginDesc{klass=class io.confluent.connect.ibm.mq.IbmMQSourceConnector, name='io.confluent.connect.ibm.mq.IbmMQSourceConnector', version='5.1.0', encodedVersion=5.1.0, type=source, typeName='source', location='file:/usr/share/java/kafka-connect-ibmmq/'}, PluginDesc{klass=class io.confluent.connect.jdbc.JdbcSinkConnector, name='io.confluent.connect.jdbc.JdbcSinkConnector', version='5.1.0', encodedVersion=5.1.0, type=sink, typeName='sink', location='file:/usr/share/java/kafka-connect-jdbc/'}, PluginDesc{klass=class io.confluent.connect.jdbc.JdbcSourceConnector, name='io.confluent.connect.jdbc.JdbcSourceConnector', version='5.1.0', encodedVersion=5.1.0, type=source, typeName='source', location='file:/usr/share/java/kafka-connect-jdbc/'}, PluginDesc{klass=class io.confluent.connect.jms.JmsSourceConnector, name='io.confluent.connect.jms.JmsSourceConnector', version='5.1.0', encodedVersion=5.1.0, type=source, typeName='source', location='file:/usr/share/java/kafka-connect-jms/'}, PluginDesc{klass=class io.confluent.connect.s3.S3SinkConnector, name='io.confluent.connect.s3.S3SinkConnector', version='5.1.0', encodedVersion=5.1.0, type=sink, typeName='sink', location='file:/usr/share/java/kafka-connect-s3/'}, PluginDesc{klass=class io.confluent.connect.storage.tools.SchemaSourceConnector, name='io.confluent.connect.storage.tools.SchemaSourceConnector', version='2.1.0-cp1', encodedVersion=2.1.0-cp1, type=source, typeName='source', location='file:/usr/share/java/kafka-connect-s3/'}, PluginDesc{klass=class org.apache.kafka.connect.file.FileStreamSinkConnector, name='org.apache.kafka.connect.file.FileStreamSinkConnector', version='2.1.0-cp1', encodedVersion=2.1.0-cp1, type=sink, typeName='sink', location='file:/usr/share/java/kafka/'}, PluginDesc{klass=class org.apache.kafka.connect.file.FileStreamSourceConnector, name='org.apache.kafka.connect.file.FileStreamSourceConnector', version='2.1.0-cp1', encodedVersion=2.1.0-cp1, type=source, typeName='source', location='file:/usr/share/java/kafka/'}, PluginDesc{klass=class org.apache.kafka.connect.tools.MockConnector, name='org.apache.kafka.connect.tools.MockConnector', version='2.1.0-cp1', encodedVersion=2.1.0-cp1, type=connector, typeName='connector', location='file:/usr/share/java/kafka/'}, PluginDesc{klass=class org.apache.kafka.connect.tools.MockSinkConnector, name='org.apache.kafka.connect.tools.MockSinkConnector', version='2.1.0-cp1', encodedVersion=2.1.0-cp1, type=sink, typeName='sink', location='file:/usr/share/java/kafka/'}, PluginDesc{klass=class org.apache.kafka.connect.tools.MockSourceConnector, name='org.apache.kafka.connect.tools.MockSourceConnector', version='2.1.0-cp1', encodedVersion=2.1.0-cp1, type=source, typeName='source', location='file:/usr/share/java/kafka/'}, PluginDesc{klass=class org.apache.kafka.connect.tools.SchemaSourceConnector, name='org.apache.kafka.connect.tools.SchemaSourceConnector', version='2.1.0-cp1', encodedVersion=2.1.0-cp1, type=source, typeName='source', location='file:/usr/share/java/kafka/'}, PluginDesc{klass=class org.apache.kafka.connect.tools.VerifiableSinkConnector, name='org.apache.kafka.connect.tools.VerifiableSinkConnector', version='2.1.0-cp1', encodedVersion=2.1.0-cp1, type=source, typeName='source', location='file:/usr/share/java/kafka/'}, PluginDesc{klass=class org.apache.kafka.connect.tools.VerifiableSourceConnector, name='org.apache.kafka.connect.tools.VerifiableSourceConnector', version='2.1.0-cp1', encodedVersion=2.1.0-cp1, type=source, typeName='source', location='file:/usr/share/java/kafka/'}

Is there something that I am missing?

[OneCricketeer]

According to the error, your plugin wasn't installed properly, or you've not defined CONNECT_PLUGIN_PATH correctly in the environment variables