You have not created any profiles from your GedCom yet. The steps are listed on the GedCompare help page: https://www.wikitree.com/wiki/Help:GEDCOMpare
Remember: if there is already a profile for a person, no new one should be created. There is only one tree, and one profile per person.
You can ask the greeter that posted the message on GedComs for more information as well.