Hi Alistair

That does indeed sound weird - I'm wondering if perhaps there are some errors in the browser console log?

Also can you check the umbraco log somehow and see if anything in there is marked with ERROR? I don't have that much Azure experience so I know it can be a bit tricky to access the file - But perhaps you can use and install Diplo Trace Log Viewer, which makes it possible to see and browse the log file sin the Developer section in the backoffice - https://our.umbraco.com/projects/developer-tools/diplo-trace-log-viewer/

/Jan

HI Jan,

There was a warning in the Console about passwords on an unsecure page but no errors I could see.

The most recent error in the Trace Log was

2018-08-03 12:50:59,696 [P4740/D2/T39] ERROR 
Umbraco.Core.UmbracoApplicationBase - An unhandled exception occurred
System.FormatException: String "1113" is not a valid udi.
   at Umbraco.Core.Udi.ParseInternal(String s, Boolean tryParse, Boolean knownTypes, Udi& udi)
   at Umbraco.Core.Udi.Parse(String s)
   at System.Linq.Enumerable.WhereSelectArrayIterator`2.MoveNext()
   at System.Linq.Buffer`1..ctor(IEnumerable`1 source)
   at System.Linq.Enumerable.ToArray[TSource](IEnumerable`1 source)
   at Umbraco.Web.PropertyEditors.ValueConverters.MediaPickerPropertyConverter.ConvertDataToSource(PublishedPropertyType propertyType, Object source, Boolean preview)
   at Umbraco.Web.PublishedCache.XmlPublishedCache.XmlPublishedProperty.get_Value()
   at Umbraco.Web.PublishedPropertyExtension.GetValue[T](IPublishedProperty property, Boolean withDefaultValue, T defaultValue)
   at Umbraco.Web.PublishedContentExtensions.GetPropertyValue[T](IPublishedContent content, String alias)
   at ASP._Page_Views_umbLayout_cshtml.Execute()
   at System.Web.WebPages.WebPageBase.ExecutePageHierarchy()
   at System.Web.Mvc.WebViewPage.ExecutePageHierarchy()
   at System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage)
   at System.Web.WebPages.WebPageBase.<>c__DisplayClass3.<RenderPageCore>b__2(TextWriter writer)
   at System.Web.WebPages.HelperResult.WriteTo(TextWriter writer)
   at System.Web.WebPages.WebPageBase.Write(HelperResult result)
   at System.Web.WebPages.WebPageBase.RenderSurrounding(String partialViewName, Action`1 body)
   at System.Web.WebPages.WebPageBase.PopContext()
   at System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage)
   at System.Web.Mvc.RazorView.RenderView(ViewContext viewContext, TextWriter writer, Object instance)
   at System.Web.Mvc.BuildManagerCompiledView.Render(ViewContext viewContext, TextWriter writer)
   at Umbraco.Core.Profiling.ProfilingView.Render(ViewContext viewContext, TextWriter writer)
   at System.Web.Mvc.ViewResultBase.ExecuteResult(ControllerContext context)
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResult(ControllerContext controllerContext, ActionResult actionResult)
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult)
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult)
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult)
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult)
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters(ControllerContext controllerContext, IList`1 filters, ActionResult actionResult)
   at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass21.<>c__DisplayClass2b.<BeginInvokeAction>b__1c()
   at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass21.<BeginInvokeAction>b__1e(IAsyncResult asyncResult)
   at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResult`1.CallEndDelegate(IAsyncResult asyncResult)
   at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResultBase`1.End()
   at System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult)
   at System.Web.Mvc.Controller.<BeginExecuteCore>b__1d(IAsyncResult asyncResult, ExecuteCoreState innerState)
   at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult)
   at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResultBase`1.End()
   at System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult)
   at System.Web.Mvc.Controller.<BeginExecute>b__15(IAsyncResult asyncResult, Controller controller)
   at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult)
   at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResultBase`1.End()
   at System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult)
   at System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.EndExecute(IAsyncResult asyncResult)
   at System.Web.Mvc.MvcHandler.<BeginProcessRequest>b__5(IAsyncResult asyncResult, ProcessRequestState innerState)
   at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult)
   at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResultBase`1.End()
   at System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult)
   at System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result)
   at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step)
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

I also found:

2018-08-03 11:49:18,632 [P4740/D2/T55] ERROR Umbraco.Web.WebApi.Filters.AngularAntiForgeryHelper - Could not validate XSRF token
System.Web.Mvc.HttpAntiForgeryException (0x80004005): The provided anti-forgery token was meant for user "", but the current user is "[email protected]".
   at System.Web.Helpers.AntiXsrf.TokenValidator.ValidateTokens(HttpContextBase httpContext, IIdentity identity, AntiForgeryToken sessionToken, AntiForgeryToken fieldToken)
   at System.Web.Helpers.AntiXsrf.AntiForgeryWorker.Validate(HttpContextBase httpContext, String cookieToken, String formToken)
   at System.Web.Helpers.AntiForgery.Validate(String cookieToken, String formToken)
   at Umbraco.Web.WebApi.Filters.AngularAntiForgeryHelper.ValidateTokens(String cookieToken, String headerToken)

BTW, I was trying earlier to work out how to integrate a google calendar that you cold actually add events to in my webpage rather than just view via the iframes method and so tried to set up the Google Calendar API. As a result I created a Partial with this code in it:

@inherits Umbraco.Web.Mvc.UmbracoTemplatePage

<p>Google Calendar API Quickstart</p>

<!--Add buttons to initiate auth sequence and sign out-->
<button id="authorize_button" style="display: none;">Authorize</button>
<button id="signout_button" style="display: none;">Sign Out</button>

<pre id="content"></pre>



<script type="text/javascript">
  // Client ID and API key from the Developer Console
  var CLIENT_ID = 'myId';
  var API_KEY = 'myKey';

  // Array of API discovery doc URLs for APIs used by the quickstart
  var DISCOVERY_DOCS = ["https://www.googleapis.com/discovery/v1/apis/calendar/v3/rest"];

  // Authorization scopes required by the API; multiple scopes can be
  // included, separated by spaces.
  var SCOPES = "https://www.googleapis.com/auth/calendar.readonly";

  var authorizeButton = document.getElementById('authorize_button');
  var signoutButton = document.getElementById('signout_button');

  /**
   *  On load, called to load the auth2 library and API client library.
   */
  function handleClientLoad() {
    gapi.load('client:auth2', initClient);
  }

  /**
   *  Initializes the API client library and sets up sign-in state
   *  listeners.
   */
  function initClient() {
    gapi.client.init({
      apiKey: API_KEY,
      clientId: CLIENT_ID,
      discoveryDocs: DISCOVERY_DOCS,
      scope: SCOPES
    }).then(function () {
      // Listen for sign-in state changes.
      gapi.auth2.getAuthInstance().isSignedIn.listen(updateSigninStatus);

      // Handle the initial sign-in state.
      updateSigninStatus(gapi.auth2.getAuthInstance().isSignedIn.get());
      authorizeButton.onclick = handleAuthClick;
      signoutButton.onclick = handleSignoutClick;
    });
  }

  /**
   *  Called when the signed in status changes, to update the UI
   *  appropriately. After a sign-in, the API is called.
   */
  function updateSigninStatus(isSignedIn) {
    if (isSignedIn) {
      authorizeButton.style.display = 'none';
      signoutButton.style.display = 'block';
      listUpcomingEvents();
    } else {
      authorizeButton.style.display = 'block';
      signoutButton.style.display = 'none';
    }
  }

  /**
   *  Sign in the user upon button click.
   */
  function handleAuthClick(event) {
    gapi.auth2.getAuthInstance().signIn();
  }

  /**
   *  Sign out the user upon button click.
   */
  function handleSignoutClick(event) {
    gapi.auth2.getAuthInstance().signOut();
  }

  /**
   * Append a pre element to the body containing the given message
   * as its text node. Used to display the results of the API call.
   *
   * @param {string} message Text to be placed in pre element.
   */
  function appendPre(message) {
    var pre = document.getElementById('content');
    var textContent = document.createTextNode(message + '\n');
    pre.appendChild(textContent);
  }

  /**
   * Print the summary and start datetime/date of the next ten events in
   * the authorized user's calendar. If no events are found an
   * appropriate message is printed.
   */
  function listUpcomingEvents() {
    gapi.client.calendar.events.list({
      'calendarId': 'primary',
      'timeMin': (new Date()).toISOString(),
      'showDeleted': false,
      'singleEvents': true,
      'maxResults': 10,
      'orderBy': 'startTime'
    }).then(function(response) {
      var events = response.result.items;
      appendPre('Upcoming events:');

      if (events.length > 0) {
        for (i = 0; i < events.length; i++) {
          var event = events[i];
          var when = event.start.dateTime;
          if (!when) {
            when = event.start.date;
          }
          appendPre(event.summary + ' (' + when + ')')
        }
      } else {
        appendPre('No upcoming events found.');
      }
    });
  }

</script>





<script async defer src="https://apis.google.com/js/api.js"
  onload="this.onload=function(){};handleClientLoad()"
  onreadystatechange="if (this.readyState === 'complete') this.onload()">
</script>

Could this be the culprit?

OK, found Node 1113. It is an image file, and one which has been on the site for ages without causing any problems.

is working on a reply...