Icon to image display failed

[green0701]

@font-face {
font-family: "myDocumentEditor"; /* Project id 3353833 */
src: url('iconfont.woff2?t=1650769832866') format('woff2'),
url('iconfont.woff?t=1650769832866') format('woff'),
url('iconfont.ttf?t=1650769832866') format('truetype');
}

.dcs-font {
font-family: "myDocumentEditor" !important;
font-size: 16px;
font-style: normal;
}
.tempICON::before
{
content: "\e964";
font-family: "myDocumentEditor" !important;
}
In html:

javascript:
domtoimage
.toPng(document.getElementsByClassName("tempICON")[0])
.then(function (dataUrl) {
var img = new Image();
img.src = dataUrl;
document.body.appendChild(img);
})
.catch(function (error) {
console.error('oops, something went wrong!', error);
});

[AndySpider]

Same issue here, any solution?