camel bundle is throwing Run time exception Property with key [xxx.yyy] not found in properties from text: {{xxx.yyy}}

org.osgi.service.blueprint.container.ComponentDefinitionException: Unable to initialize bean .camelBlueprint.factory.tester
	at org.apache.aries.blueprint.container.BeanRecipe.runBeanProcInit(BeanRecipe.java:593)
	at org.apache.aries.blueprint.container.BeanRecipe.internalCreate2(BeanRecipe.java:703)

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Caused by: org.apache.camel.NoSuchBeanException: Cannot lookup: routes from registry: org.apache.camel.blueprint.BlueprintContainerRegistry@13d9c237 with expected type: interface org.apache.camel.RoutesBuilder due: Cound not create component instance for routes
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Caused by: org.apache.camel.RuntimeCamelException: java.lang.IllegalArgumentException: Property with key [xxx.yyy] not found in properties from text: {{xxx.yyy}}
	at org.apache.camel.util.ObjectHelper.wrapRuntimeCamelException(ObjectHelper.java:1830)