E_INVALIDARG in MAP (D3D11) - c++

Question

Good afternoon.
I am trying to write a program that will display pixels for me from the desktop, but I get an E_INVALIDARG error in the Map function.
Below I have attached my function and indicated with a comment where I got this error. I also inserted the D3D11_CREATE_DEVICE_DEBUG flag in the D3D11CreateDevice function, but it doesn't output anything. Please help.
BYTE* GetImageData()
{
if (pDupTex2D != NULL)
{
printf("Tap1\n");
/*
D3D11_TEXTURE2D_DESC description;
pDupTex2D->GetDesc(&description);
description.BindFlags = 0;
description.CPUAccessFlags = D3D11_CPU_ACCESS_READ | D3D11_CPU_ACCESS_WRITE;
description.Usage = D3D11_USAGE_STAGING;
description.Format = DXGI_FORMAT_B8G8R8A8_UNORM;*/
D3D11_TEXTURE2D_DESC Desc;
//Desc.Width = 3440;
//Desc.Height = 1440;
Desc.Format = DXGI_FORMAT_B8G8R8A8_UNORM;
Desc.Usage = D3D11_USAGE_STAGING;
Desc.BindFlags = 0;
Desc.CPUAccessFlags = D3D11_CPU_ACCESS_READ | D3D11_CPU_ACCESS_WRITE;
pDupTex2D->GetDesc(&Desc);
ID3D11Texture2D *texTemp = NULL;
HRESULT hr = pD3DDev->CreateTexture2D(&Desc, NULL, &texTemp);
std::cout << std::hex<<hr << std::endl;
if (FAILED(hr))
{
if (texTemp)
{
texTemp->Release();
texTemp = NULL;
}
return NULL;
}
printf("Tap2\n");
pCtx->CopyResource(texTemp, pDupTex2D);
D3D11_MAPPED_SUBRESOURCE mapped;
unsigned int subresource = D3D11CalcSubresource(0, 0, 0);
hr = pCtx->Map(texTemp, subresource, D3D11_MAP_READ_WRITE, 0, &mapped); // ERROR ===================================
std::cout << std::hex << hr << std::endl;
if (FAILED(hr))
{
texTemp->Release();
texTemp = NULL;
return NULL;
}
printf("Tap3\n");
unsigned char* captureData = new unsigned char[Desc.Width * Desc.Height * 4];
RtlZeroMemory(captureData, Desc.Width * Desc.Height * 4);
const int pitch = mapped.RowPitch;
unsigned char* source = static_cast<unsigned char*>(mapped.pData);
unsigned char* dest = captureData;
for (int i = 0; i < Desc.Height; i++) {
memcpy(captureData, source, Desc.Width * 4);
source += pitch;
captureData += Desc.Width * 4;
}
for (int i = 0; i < Desc.Width * Desc.Height * 4; i++) {
printf("h");
std::cout << "Pixel[%d] = %x\n" << i << dest[i] << std::endl;
}
pCtx->Unmap(texTemp, 0);
return dest;
}
else {
return NULL;
}
}