I am receiving a tool error using the Galaxy Barcode Splitter tool:

"tool error
An error occurred with this dataset:
Unable to finish job"

This comes from a workflow, where I also ask to delete previous datasets. The tool does appear to be working and finishing the job (output is complete), but still returns a red-highlighted tool error. Also, datasets are not deleted.

Traceback (most recent call last):
  File "/galaxy-repl/instances/main/server/lib/galaxy/jobs/runners/__init__.py", line 589, in finish_job
    job_state.job_wrapper.finish( stdout, stderr, exit_code )
  File "/galaxy-repl/instances/main/server/lib/galaxy/jobs/__init__.py", line 1260, in finish
    ActionBox.execute(self.app, self.sa_session, pja.post_job_action, job)
  File "/galaxy-repl/instances/main/server/lib/galaxy/jobs/actions/post.py", line 532, in execute
    ActionBox.actions[pja.action_type].execute(app, sa_session, pja, job, replacement_dict)
  File "/galaxy-repl/instances/main/server/lib/galaxy/jobs/actions/post.py", line 405, in execute
    for input_dataset in [x.dataset for x in j2c.input_datasets if x.dataset.creating_job.workflow_invocation_step and x.dataset.creating_job.workflow_invocation_step.workflow_invocation == wfi]:
AttributeError: 'NoneType' object has no attribute 'input_datasets'

Any tips to fix the workflow actions are appreciated.