camel-http4 with toD does not work on Karaf

<route id="cbr-route">
  <from id="_from1" uri="timer:timerName?repeatCount=1"/>
  <setHeader headerName="myurl" id="_setHeader1">
    <constant>www.redhat.com/en</constant>
  </setHeader>
  <toD id="_toD1" uri="http4://${header.myurl}"/>
  <log id="_log1" message="Done processing"/>
</route>

java.lang.IllegalArgumentException: Cannot find endpoint with scheme http4
at org.apache.camel.runtimecatalog.AbstractCamelCatalog.endpointProperties(AbstractCamelCatalog.java:543) ~[!/:2.23.2.fuse-7_11_0-00037-redhat-00001]
at org.apache.camel.http.common.HttpSendDynamicAware.prepare(HttpSendDynamicAware.java:58) ~[?:?]
at org.apache.camel.processor.SendDynamicProcessor.process(SendDynamicProcessor.java:118) ~[!/:2.23.2.fuse-7_11_0-00037-redhat-00001]
at org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:548) [!/:2.23.2.fuse-7_11_0-00037-redhat-00001]
at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:201) [!/:2.23.2.fuse-7_11_0-00037-redhat-00001]
at org.apache.camel.processor.Pipeline.process(Pipeline.java:138) [!/:2.23.2.fuse-7_11_0-00037-redhat-00001]
at org.apache.camel.processor.Pipeline.process(Pipeline.java:101) [!/:2.23.2.fuse-7_11_0-00037-redhat-00001]
at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:201) [!/:2.23.2.fuse-7_11_0-00037-redhat-00001]
at org.apache.camel.component.timer.TimerConsumer.sendTimerExchange(TimerConsumer.java:197) [!/:2.23.2.fuse-7_11_0-00037-redhat-00001]
at org.apache.camel.component.timer.TimerConsumer$1.run(TimerConsumer.java:79) [!/:2.23.2.fuse-7_11_0-00037-redhat-00001]
at java.util.TimerThread.mainLoop(Timer.java:555) [?:1.8.0_282]
at java.util.TimerThread.run(Timer.java:505) [?:1.8.0_282]