Bug in 'babylon.gui.js' module...

My Babylon.js scene was working finely yesterday...but today it showing me following errors.

I definitely tell that this error is due to babylon.gui.js file.

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I have imported the scripts in following manner.

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and I used it to create gui as: 

Please help me with this..how can I resolve the error and get my scene working smoothly..??

Thanks if you can help me..!