That indicates a corrupted configuration file. When you say you did a clean install, did you just uninstall and reinstall or did you follow the steps here?
And I also notice that you’re set the root directory as Z:\ - are you sure that’s what you wanted because MCEBuddy doesn’t appear to have permissions to that root folder:
ERROR> 2018-05-20T10:59:27 MCEBuddy.Engine.QueueManager → Unable to search for files in location Z:\ for monitor task All Rec