Please Check if you are using any extensions and also do send us a list of Components you are using.
Thanks
I am using many extensions. But error is coming only one screen.
Please send the screenshot of all the extensions you are using so that we can figure out the defaulter extension
When this error is triggered?
On Screen Initialize
Please show us your blocks
Show your blocks of screen one
BTW I have asked the same I think
You have not specified the screen 
Problem solved. The error was coming because of an extension.
Nice knowing it @Pankaj_Developer
But please can you share which extension was causing the error so that it can help others
And also how you have solved it
The Photo View extension was causing the problem. Then I updated it. Then the problem was over.
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