Workflow locking document - analysis, debug?

Hello Experts,

We are having issues making the WF's work in ESO 5.1

At this point, we are working with Contract WF's, but it's locking the documents.

Any pointers on how to make an analysis or debug of what the WF is actually doing?

We've added a logger for messaging coding in the pre/post scripts, but where is this actually seen? There's nothing on the Setup -> System Information-> Logs

Your help is appreciated. Thanks!