Kamon throws java.lang.ClassNotFoundException on Kafka instrumentation class - scala

Question

I'm working on a Kafka streams application written in scala 2.13 project with the following Kamon packages:
libraryDependencies += "io.kamon" %% "kamon-datadog" % "2.5.4"
libraryDependencies += "io.kamon" %% "kamon-bundle" % "2.5.4"
libraryDependencies += "io.kamon" %% "kamon-kafka" % "2.5.4"
And the following Kamon configurations:
kanela {
show-banner = true
log-level = "DEBUG"
modules {
kafka-client-module {
name = "Kafka Clients(Producers|Consumers) Instrumentation Module"
stoppable = true
instrumentations = [
"kamon.kafka.instrumentation.ProducerInstrumentation",
"kamon.kafka.instrumentation.ConsumerInstrumentation"
]
within = [
"org.apache.kafka.clients.*",
]
}
}
}
But when I'm running the application, Kamon fails to find the instrumentation classes:
[Attach Listener] INFO 2022-08-07 19:01:30 Logger : Loading Kafka Clients(Producers|Consumers) Instrumentation Module
[Attach Listener] INFO 2022-08-07 19:01:30 Logger : ==> Loading kamon.kafka.instrumentation.ProducerInstrumentation
[Attach Listener] WARNING 2022-08-07 19:01:30 Logger : Error trying to load Instrumentation: kamon.kafka.instrumentation.ProducerInstrumentation with error: java.lang.ClassNotFoundException: kamon.kafka.instrumentation.ProducerInstrumentation
[Attach Listener] INFO 2022-08-07 19:01:30 Logger : ==> Loading kamon.kafka.instrumentation.ConsumerInstrumentation
[Attach Listener] WARNING 2022-08-07 19:01:30 Logger : Error trying to load Instrumentation: kamon.kafka.instrumentation.ConsumerInstrumentation with error: java.lang.ClassNotFoundException: kamon.kafka.instrumentation.ConsumerInstrumentation
[Attach Listener] INFO 2022-08-07 19:01:30 Logger : Retransformation Strategy activated for: Kafka Clients(Producers|Consumers) Instrumentation Module
I reloaded sbt.build, and can see kamon-kafka" % "2.5.4 in the dependencies list (in IntelliJ).
What could it be?