If you have Workspace with multiple folders, and the settings.json for a one the folder contains the triggerTaskOnSave it says: "This setting cannot be applied now. It will be applied when you open this folder directly." 
If you have Workspace with multiple folders, and the settings.json for a one the folder contains the triggerTaskOnSave it says:
"This setting cannot be applied now. It will be applied when you open this folder directly."