title: Kamon throws java.lang.ClassNotFoundException on Kafka instrumentation class
body: <p>I'm working on a Kafka streams application written in scala 2.13 project with the following Kamon packages:</p>
  <pre><code>libraryDependencies += &quot;io.kamon&quot; %% &quot;kamon-datadog&quot; % &quot;2.5.4&quot;
  libraryDependencies += &quot;io.kamon&quot; %% &quot;kamon-bundle&quot; % &quot;2.5.4&quot;
  libraryDependencies += &quot;io.kamon&quot; %% &quot;kamon-kafka&quot; % &quot;2.5.4&quot;
  </code></pre>
  <p>And the following Kamon configurations:</p>
  <pre><code>kanela {
    show-banner = true
    log-level = &quot;DEBUG&quot;
  
    modules {
      kafka-client-module {
        name = &quot;Kafka Clients(Producers|Consumers) Instrumentation Module&quot;
        stoppable = true
        instrumentations = [
          &quot;kamon.kafka.instrumentation.ProducerInstrumentation&quot;,
          &quot;kamon.kafka.instrumentation.ConsumerInstrumentation&quot;
        ]
        within = [
          &quot;org.apache.kafka.clients.*&quot;,
        ]
      }
    }
  }
  </code></pre>
  <p>But when I'm running the application, Kamon fails to find the instrumentation classes:</p>
  <pre><code>[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 :  ==&gt; 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 :  ==&gt; 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 
  </code></pre>
  <p>I reloaded sbt.build, and can see <code>kamon-kafka&quot; % &quot;2.5.4</code> in the dependencies list (in IntelliJ).
  What could it be?</p>