Went through a clean install on ColdFusion 10 on a local development machine and clicked on 'sessions' and the following error appeared:
Either there are no methods with the specified method name and argument types or the getSession method is overloaded with argument types that ColdFusion cannot decipher reliably. ColdFusion found 0 methods that match the provided arguments. If this is a Java object and you verified that the method exists, use the javacast function to reduce ambiguity.
The getSession method was not found.
Thanks for the bug report. CF10 has removed the method I was relying on, from some initial testing it appears that they've reworked some of the session management features towards applications. I'll see if I can update the current releases to add support.
Fixed in misterdai/cftracker@39897ef
Release as CFTracker 2.2