Failing to load a png image in SDL2

Question

I am trying to load PNG image, but it always ends in an error. I was first trying to use SDL's SDL_LoadBMP, but since that dind't work, I downloaded SDL2_image.h, did all the setup, but it still isn't working. The image is in the same directory as the cpp file. When I run my program, it runs, but prints error. Here is the function to load the image:

void loadImage()
{
    image = IMG_Load("Untitled.png");
    if (image == NULL)
        std::cout << "error: " << SDL_GetError();
}

The error message from SDL_GetError is Failed loading libpng16-16.dll: The specified module could not be found. I tried passing the full path, but it gives an error and I don't know how to get around that problem since I am a beginner. Thanks.

Edit: After reading through the article linked in the answer to the tagged-duplicate question and making some changes(particularly installing the missing dll file and putting it in the same directory as the main cpp flie), I am getting this error message in a pop-up window: The procedure entry point inflateValidate could not be located in the dynamic link library, and the path to libpng16-16.dll is given after that.