Scans too dark even when taken in good light.

[Vivacious_detail5DAA]

The app used to be very good but from a month or so. Whenever i go to scan the screen is dark as shown above even if there is good light available. And the scanned document is also dark. Deleting and reinstalling does not seem to fix the issue. I don't know what to do. 

[Dipayan15]

Same case