将AppleScript放入工作流时工作失败

非常 AppleScript新手。

我有一个非常简单的, 在Automator中作为工作流/应用程序的一部分运行时,总是失败的AppleScript。我知道脚本可以工作,因为我可以在脚本编辑器中多次运行它,并且没有错误。

以下是脚本:

activate application "Chess"

tell application "System Events" to tell process "Chess"
    click menu item "Preferences…" of menu "Chess" of menu bar item "Chess" of menu bar 1

    tell window 1
            repeat until sheet 1 exists
                delay 0.1
            end repeat
    end tell

    tell group "Speech" of sheet 1 of window 1
        set checkboxOne to checkbox "Allow Player to Speak Moves"
        set checkboxTwo to checkbox "Speak Computer Moves"
        set checkboxThree to checkbox "Speak Human Moves"

        tell checkboxOne
            set checkBoxStatus to value of checkboxOne as boolean
            if checkBoxStatus is true then click checkboxOne
        end tell
        tell checkboxTwo
            set checkBoxStatus to value of checkboxTwo as boolean
            if checkBoxStatus is true then click checkboxTwo
        end tell
        tell checkboxThree
            set checkBoxStatus to value of checkboxThree as boolean
            if checkBoxStatus is true then click checkboxThree
        end tell
    end tell

    click button "OK" of sheet 1 of window 1
end tell

System Events got an error: Can’t get sheet 1 of window 1 of process "Chess". Invalid index.

突出显示的线为

click button "OK" of sheet 1 of window 1

有什么我遗漏的吗?为什么会发生此错误?我如何修复它?

提前感谢您的帮助!