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Validation of Viewstate MAC Failed RRS feed

  • Question

  • Hi, I hit the Viewstate issue like below

    Function ID: Global.asax::Application_Error()

    Error: Validation of viewstate MAC failed. If this application is hosted by a Web Farm or Cluster, ensure that machinekey configuration specifies the same validationkey and validation algorithm. AutoGenerate cannot be used in a cluster.

    I have tried out the instruction given my Microsoft, but it seems not work for me.

    Anything else I can check?

    support.microsoft.com/en-sg/help/2915218/resolving-view-state-message-authentication-code-mac-errors

    Tuesday, June 19, 2018 10:44 AM