I have this simple html (from this example):
<head>
<meta charset="UTF-8">
<title>Embeded test</title>
</head>
<body>
<script
src="https://demo.bokeh.org/sliders/autoload.js?bokeh-autoload-element=1000&bokeh-app-path=/sliders&bokeh-absolute-url=https://demo.bokeh.org/sliders"
id="1000">
</script>
</body>
</html>
Log:
Server:
I tried it on my server and got this log from sever:
Refusing websocket connection from Origin 'null'; use --allow-websocket-origin= or set BOKEH_ALLOW_WS_ORIGIN= to permit this; currently we allow origins ...
The origin is null (as shown in the highlighted Request Headers in the picture above).