Streaming dataset tiles in an embedded dashboard load data fine in my test. Can you try again? Maybe it was a short period site outage. If the error still persists, I'd suggest you submit a support ticket, with the canceled request details.
<html><script src="https://microsoft.github.io/PowerBI-JavaScript/demo/node_modules/jquery/dist/jquery.js"></script><script src="https://microsoft.github.io/PowerBI-JavaScript/demo/node_modules/powerbi-client/dist/powerbi.js"></script><script type="text/javascript">
window.onload = function () {
var embedConfiguration = {
type: 'dashboard', // change report to dashboard
accessToken: 'yourTokenHere',
//change report embed url to dashboard embed url
embedUrl: 'https://app.powerbi.com/dashboardEmbed?dashboardId=739082ea-c354xxxxxx'
};
var $reportContainer = $('#dashboardContainer');
var report = powerbi.embed($reportContainer.get(0), embedConfiguration);
}
</script> <div id="dashboardContainer"></div></html>