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Windows Server 2019 - IE11 WebForm_DoPostBackWithOptions error RRS feed

  • Question

  • I have an application running .NET Framework 4.7.2 which we have recently started migrating onto Windows Server 2019 servers. We have started receiving reports of issues in Internet Explorer 11 having issues with controls (which we can replicate). Some of the errors we see in the console include.

    'WebForm_FireDefaultButton' is undefined
    'WebForm_SaveScrollPositionSubmit' is undefined
    'WebForm_DoPostBackWithOptions' is undefined

    When an app pool recycle is performed on the application, the issue seems to go away for a period of time, but does return.

    I recently came across the following article in which the symptoms appear to be very similar, but for a previous version of Windows Server.

    https://support.microsoft.com/en-gb/help/2600088/a-hotfix-is-available-for-the-asp-net-browser-definition-files-in-the?WT.mc_id=-blog-scottha#

    Has anyone else experienced similar issues with software running on Windows Server 2019 accessed with IE11?

    Thursday, July 16, 2020 1:07 PM