ClassNotFoundException KafkaLog4jAppender

[BigDuke6nc]

When using the cp-ksqldb-server image I am getting this message written to stdout:

log4j:ERROR Could not instantiate class [org.apache.kafka.log4jappender.KafkaLog4jAppender].
java.lang.ClassNotFoundException: org.apache.kafka.log4jappender.KafkaLog4jAppender
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
at java.base/java.lang.Class.forName0(Native Method)
at java.base/java.lang.Class.forName(Class.java:315)
at org.apache.log4j.helpers.Loader.loadClass(Loader.java:190)
at org.apache.log4j.helpers.OptionConverter.instantiateByClassName(OptionConverter.java:304)
at org.apache.log4j.helpers.OptionConverter.instantiateByKey(OptionConverter.java:123)
at org.apache.log4j.PropertyConfigurator.parseAppender(PropertyConfigurator.java:755)
at org.apache.log4j.PropertyConfigurator.parseCategory(PropertyConfigurator.java:738)
at org.apache.log4j.PropertyConfigurator.parseCatsAndRenderers(PropertyConfigurator.java:652)
at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:518)
at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:577)
at org.apache.log4j.helpers.OptionConverter.selectAndConfigure(OptionConverter.java:504)
at org.apache.log4j.LogManager.(LogManager.java:119)
at org.slf4j.impl.Reload4jLoggerFactory.(Reload4jLoggerFactory.java:67)
at org.slf4j.impl.StaticLoggerBinder.(StaticLoggerBinder.java:72)
at org.slf4j.impl.StaticLoggerBinder.(StaticLoggerBinder.java:45)
at org.slf4j.LoggerFactory.bind(LoggerFactory.java:150)
at org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:124)
at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:417)
at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:362)
at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:388)
at io.confluent.admin.utils.cli.KafkaReadyCommand.(KafkaReadyCommand.java:53)
log4j:ERROR Could not instantiate appender named "kafka_appender".
SLF4J: A number (165) of logging calls during the initialization phase have been intercepted and are
SLF4J: now being replayed. These are subject to the filtering rules of the underlying logging system.
SLF4J: See also http://www.slf4j.org/codes.html#replay

I do see kafka-log4j-appender-7.4.1-ccs.jar in the /usr/share/java/ksqldb-server directory.