"transforms.readToInsert.type": "io.debezium.connector.mysql.transforms.ReadToInsertEvent",
"transforms": "readToInsert,..."

org.apache.kafka.connect.errors.ConnectException: io.debezium.connector.mysql.transforms.ReadToInsertEvent.config() must return a ConfigDef that is not null.
	at org.apache.kafka.connect.runtime.ConnectorConfig$EnrichablePlugin.getConfigDefFromConfigProvidingClass(ConnectorConfig.java:512)
	at org.apache.kafka.connect.runtime.ConnectorConfig$EnrichablePlugin.configDefsForClass(ConnectorConfig.java:472)
	at org.apache.kafka.connect.runtime.ConnectorConfig$2.configDefsForClass(ConnectorConfig.java:331)
	at org.apache.kafka.connect.runtime.ConnectorConfig$EnrichablePlugin.populateConfigDef(ConnectorConfig.java:453)
	at org.apache.kafka.connect.runtime.ConnectorConfig$EnrichablePlugin.enrich(ConnectorConfig.java:437)
	at org.apache.kafka.connect.runtime.ConnectorConfig.enrich(ConnectorConfig.java:360)
	at org.apache.kafka.connect.runtime.AbstractHerder.validateConnectorConfig(AbstractHerder.java:355)
	at org.apache.kafka.connect.runtime.AbstractHerder.lambda$validateConnectorConfig$1(AbstractHerder.java:326)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at java.base/java.lang.Thread.run(Thread.java:829)