Tasklist plugin is not shown in tasklist

Hi at all,
I am currently trying to write a simple tasklist plugin. There shall just be a link to another website in the tasklist.navbar.action.
My main source was this site Plugins | docs.camunda.org.
So what I did:

  1. I cloned the code for a cockpit plugin https://github.com/camunda/camunda-bpm-examples/tree/master/cockpit/cockpit-sample-plugin.
  2. I followed the two tasklist plugin examples https://github.com/camunda/camunda-bpm-webapp/tree/master/src/main/java/org/camunda/bpm/tasklist/impl/plugin and https://github.com/camunda/camunda-bpm-webapp/tree/master/ui/tasklist/plugins/standaloneTask/app and replaced the code of my cockpit plugin with the example tasklist code.

However I am getting following error when clicking on tasklist:

There seems to some problem with the file called “org.camunda.bpm.tasklist.plugin.spi.TasklistPlugin”. I renamed it to “org.camunda.bpm.tasklist.plugin.spi.impl.AbstractTasklistPlugin”. Then I was able to open tasklist, but I could not see the plugin.

Does anybody have a full working tasklist example? The camunda documentation does not help me anymore…
Or does anybody know the issue and can help me?

Thank you :slight_smile: