Hi Ambrose

Im more of a newbie than you are.  I have run into the same problem. If I build a simple Adapt course with the authoring tool, it previews perfectly well.  However if I add the Spoor extension I cannot preview and get the Red cross error.

How exactly did you fix the problem by running node upgrade.js?  Was this command run in the terminal window session that you enter mongod to begin an Adapt session? Or, do you run the command in a terminal window session where the node server command is subsequently run? (I think the latter but don't want to screw up hours of work setting this all up)

Thanks in Advance!