Cannot run my workflow


I extracted a workflow from my history, and I am unable to “run” the workflow.
When I run the work flow, I see a “Workflow Invocation State” notice and “step scheduling” summary but nothing happens after that.
I verified that all individual steps are working well without any problem, but I cannot run them together as a workflow.
I will greatly appreciate any help for sorting this problem.
Thank you.

Best wishes,