Opencv4 src.checkVector(2, CV_32F) == 4 && dst.checkVector(2, CV_32F) == 4

Question

I am having some problems with cv::getPerspectiveTransform in opencv4 Here is the code

typedef std::vector<std::pair<int, int>> vectorpair;
cv::Mat Perspective::fourPointTransformation(cv::Mat &img, vectorpair pts) {
    //obtain a consistent order of the point
    vectorpair points = orderPoints(std::move(pts));
    std::pair<int, int> tl = points[0];
    std::pair<int, int> tr = points[1];
    std::pair<int, int> br = points[2];
    std::pair<int, int> bl = points[3];
//    compute the width of the new image, which will be the
//    maximum distance between bottom-right and bottom-left
//    x-coordiates or the top-right and top-left x-coordinates
    int widthA = sqrt((br.first - bl.first) ^ 2 + (br.second - bl.second) ^ 2);
    int widthB = sqrt((tr.first - tl.first) ^ 2 + (tr.second - tl.second) ^ 2);
    int maxWidth = std::max(widthA, widthB);

// compute the height of the new image, which will be the
// maximum distance between the top-right and bottom-right
// y-coordinates or the top-left and bottom-left y-coordinates
    int heightA = sqrt(((tr.first - br.first) ^ 2) + ((tr.second - br.second) ^ 2));
    int heightB = sqrt(((tl.first - bl.first) ^ 2) + ((tl.second - bl.second) ^ 2));
    int maxHeight = std::max(heightA, heightB);
    vectorpair data = {{0,            0},
                       {maxWidth - 1, 0},
                       {maxWidth - 1, maxHeight - 1},
                       {0,            maxHeight - 1}};
    cv::Mat distance(4, 2, CV_32FC2, &data);
    cv::Mat M(4,2, CV_32FC1);
    M = cv::getPerspectiveTransform(points, distance);
    cv::Mat warped;
    cv::warpPerspective(img, warped, M, cv::Size_<int>(maxWidth, maxHeight));
    return warped;
}

the main file

//
// Created by jonsnow on 07/02/22.
//
#include "iostream"
#include "../include/imutils/perspective.h"
#include "opencv2/imgcodecs.hpp"
#include "opencv2/highgui.hpp"

typedef std::vector<std::pair<int, int>> vectorpair;
int main() {
    vectorpair pair = {{101, 185},
                       {393, 151},
                       {479, 323},
                       {187, 441}};
    cv::Mat img = cv::imread("../demo_images/notecard.png", cv::IMREAD_COLOR);

    if (img.empty()) {
        std::cout << "Could not read the image: " << std::endl;
        return 1;
    }
    cv::Mat imgwarped = Perspective::fourPointTransformation(img, pair);
    imshow("Display window",imgwarped );
    cv::waitKey(0); // Wait for a keystroke in the window


}

this is the error I am getting

terminate called after throwing an instance of 'cv::Exception'
  what():  OpenCV(4.5.5) /build/opencv/src/opencv-4.5.5/modules/imgproc/src/imgwarp.cpp:3392: error: (-215:Assertion failed) src.checkVector(2, CV_32F) == 4 && dst.checkVector(2, CV_32F) == 4 in function 'getPerspectiveTransform'

[1]    9821 abort (core dumped)  ./output

The command I have used is

c++ perspective.cpp main.cpp -o output `pkg-config --cflags --libs opencv4` && ./output

The error seems to be caused by conflicting data types however I have already changed the datatype to CV_32F