Debugging a Failed Custom Task in Craft CMS
I came across this Could not find the task component type. error upon trying to add a secondary task to my plugin.

Following the naming scheme that P&amp;T have in the PowerNap plugin, try making sure you have one task named after the plugin itself WassermanNewsTask, and then follow the subtasks, or any other additional tasks, with the underscore naming, eg. WassermanNews_TwitterTask.

There's not really any thorough documentation on Tasks, so I can't verify this is the problem, but this is what worked for me.