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Unable to create a load test for Azure Web App

Toby Bloem 20 Reputation points
2025-07-16T02:41:28.8133333+00:00

Having problem creating a load test for a web app in Azure. Upon clicking 'Create Test' it loads for a little bit then displays an error message 'Cannot read properties of undefined (reading 'name')'

Here are the steps I am following:

  1. In the Azure Portal, select an existing Web App.
  2. Under Performance, select 'Load Testing'
  3. In the Getting Starting tab, select 'Create Test'
  4. Receive error message

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This also happens if you select the Create Test dropdown and choose either of the selections (Create a URL-based test, upload a script)

Azure Load Testing
Azure Load Testing
An Azure service that enables developers and testers to generate insights on how to improve the performance, scalability, and capacity usage of their application
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Accepted answer
  1. TP 131.7K Reputation points Volunteer Moderator
    2025-07-16T02:54:14.49+00:00

    Hi Toby,

    Please make sure you have an existing Azure Load Testing (ALT) resource before you attempt to create a Test from your web app. To do this via Azure portal you can navigate to below link. click Create, fill out required information, etc., and wait for the deployment to finish:

    https://portal.azure.com/#browse/Microsoft.LoadTestService%2FLoadTests

    Once you have your ALT resource, navigate back to your Web App -- Performance -- Load testing blade and create test as you were attempting before. You should no longer see the error, and in the Load testing resource box the above ALT resource you created should already be selected.

    Please click Accept Answer and upvote if the above was helpful.

    Thanks.

    -TP

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