Error message when opening Keyboard settings

Hi All,

I opened the keyboard settings and put this command for Ctl S shortcut.  [. cget -menu].file invoke 2 

After that it shows error like missing close bracket. so i have closed the keyboard setting without saving it.

Now again when I try to open the keyboard setting menu, it is showing the error as shown in the below image. Is there anyway to rectify it.

Thanks,

Udhay

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