dom to image giving blank images

const nodes = document.querySelectorAll(".pdf-signer-container__signing-node") ?? []

if (nodes) { nodes.forEach((node) =>{ domToImage.toPng(node).then((resp: any) => { console.log("resp", resp); }) } ) }

expected result :- image of each node,

this is one url of the imagees-

data:image/png;base64,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

this is how to image is being printed