dashboard embed html iframe not working

I have project embede  power bi dashboard but i embed after he doesn't working

when i check the console he show the error massage 

VM894 powerbiportal.dependencies.bundle.min.js:130 ReferenceError: powerBIAccessToken is not defined
    at r.setAuthorizationHeader (VM897 powerbiportal.common.bundle.min.js:40)
    at r.powerbiRequestOptions (VM897 powerbiportal.common.bundle.min.js:40)
    at i.Object.defineProperty.get [as requestOptions] (VM897 powerbiportal.common.bundle.min.js:37)
    at i.n.sendLongPollRequest (VM897 powerbiportal.common.bundle.min.js:37)
    at VM897 powerbiportal.common.bundle.min.js:37
    at VM894 powerbiportal.dependencies.bundle.min.js:170
    at e (VM894 powerbiportal.dependencies.bundle.min.js:59)
    at VM894 powerbiportal.dependencies.bundle.min.js:62

My powerbi embed dashboard code 

著是demo
<?php
include('powerbi.php');//匯入我自訂的powerbi libery
$powerbi =  new powerbi();
$report = $powerbi->report();
$report  = json_decode($report);
$reportvalue = $report->value;
$access = $powerbi->token();
$token_type = $access->token_type;
$token = $access->access_token;
$dashbord = $powerbi->dashbord();
$dashbord = json_decode($dashbord);
$dashbord_value = $dashbord->value;
//$workspace =  $powerbi->workspace();
?><input type="button" value="報告  &#10; report" onclick="report()"><input type="button" value="儀錶  &#10; dashbord" onclick="dashbord()"><iframe ID="iFrameEmbedReport" height="500px" width="900px"></iframe><input type='hidden' value="<?=$token?>" id="MainContent_accessToken"><input type="hidden" value="<?=$reportvalue[0]->embedUrl?>" id="MainContent_ReportEmbedUrl"><input type="hidden" value="<?=$dashbord_value[0]->embedUrl?>" id="DashbordUrl"><script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.0/jquery.min.js"></script><script type="text/javascript">
        //This code is for sample purposes only.

        //Configure IFrame for the Report after you have an Access Token. See Default.aspx.cs to learn how to get an Access Token
		function report(){
			
            if ("" != document.getElementById('MainContent_accessToken').value)
            {
                var iframe = document.getElementById('iFrameEmbedReport');

                // To load a Report do the following:
                // Set the IFrame source to the EmbedUrl from the Get Reports operation
                iframe.src=document.getElementById('MainContent_ReportEmbedUrl').value;

                // Add an onload handler to submit the access token
                iframe.onload = postActionLoadReport;
            }
       
		}
        function dashbord(){
			if ("" != document.getElementById('MainContent_accessToken').value)
            {
                var iframe = document.getElementById('iFrameEmbedReport');
				iframe.src=document.getElementById('DashbordUrl').value + "&width=800&height=500";
				iframe.onload = postdashborad;

              
                

                // Add an onload handler to submit the access token
               
            }
		} 
        // Post the access token to the IFrame
        function postActionLoadReport() {

            // Construct the push message structure
            // this structure also supports setting the reportId, groupId, height, and width.
            // when using a report in a group, you must provide the groupId on the iFrame SRC
            var m = {
                action: "loadReport",
                accessToken: document.getElementById('MainContent_accessToken').value
            };
            message = JSON.stringify(m);

            // push the message.
            iframe = document.getElementById('iFrameEmbedReport');
            iframe.contentWindow.postMessage(message, "*");;
        }
        function postdashborad(){
			
			
			var m = {   action: "loadTile" , accessToken: "<?=$token?>", height: 500 , width: 722 };
			message = JSON.stringify(m);  
			iframe = document.getElementById('iFrameEmbedReport'); iframe.contentWindow.postMessage(message, "*");
		}</script>

I search many place everywhere said powerbi dashborad not support is really ? Is it cause my code the working result ? 

how to fix this porblem ? 

Only my report can working is very strange why it always say not find accesstoken but i have give him