Getting missing value returned from Applescript


I have a couple of Applescripts I want to run in Keyboard Maestro. When I test them to run them in the Script editor, I get a missing value returned in the console.

Here is one of my scripts:

tell application "BetterTouchTool"
	execute_assigned_actions_for_trigger "070EFD1D-BFAB-41F9-8352-3B1F7BE6D9FE"
end tell

Not sure what I am doing wrong unless this is restricted in the trial version.