'custom workflow multiple user then last user is error

from link https://ecmarchitect.com/alfresco-developer-series-tutorials/workflow/tutorial/tutorial.html

i've custom workflow multiple user like ParallelReview. Workflow can start and assign but last people have error image error

training.bpmn20.xml bpmn20

Training.bpmn20.xml

scWorkflowModel.xml

log.txt

Please help me

Thank you

I'm sorry for my bad language .



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