iOS app crashing while scanning passport MRZ

Question

The app is crashing while I am trying to scan the MRZ code on the passport. This is the log:

OpenCV Error: Assertion failed (0 <= roi.x && 0 <= roi.width && roi.x + roi.width <= m.cols && 0 <= roi.y && 0 <= roi.height && roi.y + roi.height <= m.rows) in Mat, file ../matrix.cpp, line 517 libc++abi.dylib: terminating with uncaught exception of type cv::Exception: ../matrix.cpp:517: error: (-215) 0 <= roi.x && 0 <= roi.width && roi.x + roi.width <= m.cols && 0 <= roi.y && 0 <= roi.height && roi.y + roi.height <= m.rows in function Mat

Here is the stack trace:

#12 0x0062662c in cv::Mat::operator()(cv::Rect_ const&) const
#13 0x00628c72 in ::-[PassportScanner realProcessImage:](cv::Mat &)

Contents of the above function are as follows:

Mat Mat::operator()( const Rect& roi ) const
{
    return Mat(*this, roi);
} 

-(void) realProcessImage:(cv::Mat &)cropped {

    //Some other code

    vector<cv::Rect> rotatedRegions = [self show:cropped gray:rotated2];

    // Sort by y
    std::sort(rotatedRegions.begin(), rotatedRegions.end(), sortByBoundingRectYPosition);

    if (rotatedRegions.size() == 2) {
        if(self.delegate)
        [self.delegate setVisualIndicatorColor:[PassportScanner getColorForFraction:0.5]];

        while (rotatedRegions[0].height + rotatedRegions[0].y >= rotated.rows) {
            rotatedRegions[0].height--;
        }

        image1 = rotated(rotatedRegions[0]);

        while (rotatedRegions[1].height + rotatedRegions[1].y >= rotated.rows) {
            rotatedRegions[1].height--;
        }

        image2 = rotated(rotatedRegions[1]); //**——>Problem starts here**

        //More code

}

I have looked at these links but none of them helped me solve the problem:
Error with OpenCV ROI
OpenCv assertion failed