I am trying to save a collage of images created on a React Canvas Front end. However since I am fetching my images from a server, it is giving me the following error: Uncaught DOMException: Failed to execute 'toDataURL' on 'HTMLCanvasElement': Tainted canvases may not be exported. My code is as follows:

const imgHidden = new Image();
        imgHidden.src = layer 
        imgHidden.crossOrigin="Anonymous"
        imgHidden.onload= () => {
            const ctxHidden = hiddenCanvas.current.getContext("2d")
            ctxHidden.clearRect(0, 0, hiddenCanvas.width, hiddenCanvas.height);
            ctxHidden.drawImage(imgHidden, 0,0, 900, 900)     
    }

//layer has the url from where image is coming (https://xxx.s3.filebase.com/abc.png)

function saveImage() {
        let imageToSave = new Image();
        imageToSave.crossOrigin="anonymous"
        imageToSave.src = hiddenCanvas.current.toDataURL('image/png', 1.0);
        setSavedImage(imageToSave.src)
        //alert("Patience Lurker! Minting isn't active yet!")
    }

The server where I have stored my images has an option of adding CORS. I added the following JSON:

{
    "CORSRules": [
        {
            "AllowedHeaders": [],
            "AllowedMethods": [
                "GET"
            ],
            "AllowedOrigins": [
                "*"
            ],
            "ExposeHeaders": []
        }
    ]
}

However it did not work. What "allowed methods" do I need to add for this to work in React Canvas?

Occasionally it gives me this error: Access to image at 'https://bucketname.s3.filebase.com/2.png' from origin 'http://localhost:3000' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.

Also, due to the imgHidden.crossOrigin="Anonymous" line in the draw function, I get an error: GET https://traits.s3.filebase.com/101.png net::ERR_FAILED 200 while trying to dynamically change images on canvas. So basically my canvas stops working if this line is present and if I remove the line, the CORS issue prevents me from saving the base64.