we got some issues when downloaded and run web notify sample code in java script

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My changes:

Added UA delegate methods couple of code into snippet.html

<script type="text/javascript">
// 86acbd31cd7c09cf30acb66d2fbedc91daa48b86:1511858682.01
!function(n,t,c,e,u){function r(n){try{f=n(u)}catch(n){return h=n,void i(p,n)}i(s,f)}function i(n,t){for(var c=0;c<n.length;c++)d(n[c],t);
}function o(n,t){return n&&(f?d(n,f):s.push(n)),t&&(h?d(t,h):p.push(t)),l}function a(n){return o(!1,n)}function d(t,c){
n.setTimeout(function(){t(c)},0)}var f,h,s=[],p=[],l={then:o,catch:a,_setup:r};n[e]=l;var v=t.createElement("script");
v.src=c,v.async=!0,v.id="_uasdk",v.rel=e,t.head.appendChild(v)}(window,document,'https://web-sdk.urbanairship.com/notify/v1/ua-sdk.min.js',
'UA', {
appKey: xxxxx,
token: xxxxxx,
vapidPublicKey: xxxxx
});

UA.then(function(sdk) {
alert(sdk.channel.id)
}).catch(function(err) {
console.log(err)
})

// Multiple calls have no additional expense.
UA.then(function(sdk) {
$('#register').show()
$('#register').click(function(ev) { sdk.register() })
})

</script>

Issues:

A bad HTTP response code (404) was received when fetching the script.
/push-worker.js Failed to load resource: net::ERR_INVALID_RESPONSE   //https://web-sdk.urbanairship.com/notify/v1/ua-sdk.min.js not loaded

we got above errors.please update how to run web notify java script code