Error Loading Extension and Definition in Azure Windows Virtual Desktop Deployment

Question

I recently created a new Windows Azure trial account and have a problem deploying Windows Virtual Desktop. Each time I try to create a new host pool it will prompt me with the ErrorLoadingExtensionAndDefinition reason code.&nbsp;&nbsp;I have contacted Azure technical support and they suggested that I post this on the forum for assistance as this error has also impacted multiple customers.&nbsp;&nbsp;Here's the full error summary. Hope someone can help me find a workaround so that I can deploy Windows Virtual Desktop.&nbsp;{ "shellProps": { "sessionId": "56c957f1339a4fd6af1852baf5372040", "extName": "Microsoft_Azure_WVD", "contentName": "HostpoolBlade" }, "error": { "message": "Error displaying your content", "summaryItems": [ { "label": "Error reason", "value": "ErrorLoadingExtensionAndDefinition" } ], "details": "message: Cannot read property 'id' of undefined
stack: ###_RPC_Exception_###
TypeError: Cannot read property 'id' of undefined
 at s.n (https://afd.hosting.portal.azure.net/wvd/Content/Dynamic/1SU8pbC3yA_O.js:2:577)
 at new s (https://afd.hosting.portal.azure.net/wvd/Content/Dynamic/_HZUxDO8R410.js:9:813)
 at y (https://portal.azure.com/Content/Dynamic/_XNBddeW-0ED.js:7:3477)
 at https://portal.azure.com/Content/Dynamic/_XNBddeW-0ED.js:7:3651
 at t._dispatch (https://portal.azure.com/Content/Dynamic/_XNBddeW-0ED.js:7:5396)
 at t._get (https://portal.azure.com/Content/Dynamic/_XNBddeW-0ED.js:7:3216)
 at t.get (https://portal.azure.com/Content/Dynamic/_XNBddeW-0ED.js:7:1856)
 at new t (https://portal.azure.com/Content/Dynamic/_XNBddeW-0ED.js:68:5620)
 at https://portal.azure.com/Content/Dynamic/_XNBddeW-0ED.js:84:2425
 at o (https://portal.azure.com/Content/Dynamic/P8kXagqyUZue.js:4:72)
From RPC: fx -&gt; Microsoft_Azure_WVD (MsPortalFx.Internal.Constants.RpcMethods.tryEarlyGetViewModel)
(Callstack capturing is not enabled. Use ?trace=diagnostics to enable it.)
", "code": null }}

powellbc · Answer

It seems if you use the old deployment (Pre-Spring 2020) method it at least does no error out immediately.

nickbart · Answer

StevenSolomon&nbsp;&nbsp;Have the same issue on Chrome, opened it in Edge and worked fine! Whenever we interact with the Portal, Azure, Office 365 etc we always use Edge as it acts very different in other browsers.&nbsp;

wouter priester · Answer

StevenSolomon&nbsp;i have the same issue at the moment...&nbsp;

grahamnorris · Answer

StevenSolomonI'm seeing the same thing, created a post a little while ago - https://techcommunity.microsoft.com/t5/windows-virtual-desktop/error-in-portal-when-clicking-create-a-host-pool/m-p/1458818

I found you can create a host pool using Powershell - https://docs.microsoft.com/en-us/azure/virtual-desktop/create-host-pools-powershell - but I'm now stuck because you get the same error in the portal when you try to add session hosts to the pool and I can't see a way to add sessions hosts using PS.

klskln · Answer

StevenSolomon&nbsp;Same for me for the past 8 hours.

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Error Loading Extension and Definition in Azure Windows Virtual Desktop Deployment

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