Applescript multiple commands error
UI Scripting doesn't always work well or that easily.

Try the following example AppleScript code.

tell application "Lingon X"
    activate
    tell application "System Events"
        keystroke 1 using command down
        tell application process "Lingon X"
            tell window 1
                tell splitter group 1
                    click row 1 of group 2 of list 1 of list 1 of scroll area 1 of group 1
                    click checkbox "Enabled"
                    click UI element "Save"
                end tell
            end tell
        end tell
    end tell
    quit
end tell


Note: This ran as coded on my system and took these actions on the first object shown in Lingon X, version 5.1.1 (5110), under macOS 10.12.5. It should work for you too, based on the picture shown in your OP.