Flowable Process Definition Not Found: 'ask_for_leave'

This exception is thrown when Flowable cannot find a process definition with the given key.

In this case, the key 'ask_for_leave' is not associated with any process definition in the Flowable engine.

To resolve this issue, you can check the following:

1. Verify that the process definition with the key 'ask_for_leave' exists in the Flowable engine. You can do this by checking the database or using the Flowable REST API.

2. Ensure that the process definition is deployed and available in the Flowable engine. If the process definition is not deployed, you can deploy it programmatically using the Flowable API or by using the Flowable Modeler.

3. Double-check the key used in your code to start the process instance. It should match the key of the process definition you want to start.

If none of the above steps resolve the issue, there may be a problem with your deployment or configuration setup. In such cases, you can check the Flowable logs for more detailed information about the problem.