NoSuchMethodError deep in the OpenTelemetry code

[csydvs]

Hey just trying to get a basic example of this working, unfortunately, I'm getting the following error:

'void io.opentelemetry.instrumentation.awslambdacore.v1_0.internal.AwsLambdaFunctionAttributesExtractor.set(io.opentelemetry.api.common.AttributesBuilder, io.opentelemetry.api.common.AttributeKey, java.lang.Object)': java.lang.NoSuchMethodError
java.lang.NoSuchMethodError: 'void io.opentelemetry.instrumentation.awslambdacore.v1_0.internal.AwsLambdaFunctionAttributesExtractor.set(io.opentelemetry.api.common.AttributesBuilder, io.opentelemetry.api.common.AttributeKey, java.lang.Object)'
	at io.opentelemetry.instrumentation.awslambdacore.v1_0.internal.AwsLambdaFunctionAttributesExtractor.onStart(AwsLambdaFunctionAttributesExtractor.java:52)
	at io.opentelemetry.instrumentation.awslambdacore.v1_0.internal.AwsLambdaFunctionAttributesExtractor.onStart(AwsLambdaFunctionAttributesExtractor.java:25)
	at io.opentelemetry.instrumentation.api.instrumenter.Instrumenter.doStart(Instrumenter.java:179)
	at io.opentelemetry.instrumentation.api.instrumenter.Instrumenter.start(Instrumenter.java:129)
	at io.opentelemetry.instrumentation.awslambdacore.v1_0.internal.AwsLambdaFunctionInstrumenter.start(AwsLambdaFunctionInstrumenter.java:37)
	at io.opentelemetry.instrumentation.awslambdacore.v1_0.TracingRequestHandler.handleRequest(TracingRequestHandler.java:75)

I've set the Handler on the function to be the name of my handler, I'm running java11, and here are my relevant Environment variables:

          MAIN_CLASS: <my main class>
          AWS_LAMBDA_EXEC_WRAPPER: /opt/otel-handler
          SPLUNK_REALM: <realm>
          SPLUNK_ACCESS_TOKEN: <token>
          OTEL_PROPAGATORS: b3multi
          OTEL_SERVICE_NAME: SERVICE_NAME
          OTEL_RESOURCE_ATTRIBUTES: deployment.environment=<my-environment>
          OTEL_INSTRUMENTATION_AWS_LAMBDA_FLUSH_TIMEOUT: 5000

I'm using

arn:aws:lambda:us-east-1:254067382080:layer:splunk-apm:53