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Windows Server 2019 - IE11 WebForm_DoPostBackWithOptions error

Paul Barnes 1 Reputation point
2020-07-16T12:19:38.75+00:00

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.

a-hotfix-is-available-for-the-asp-net-browser-definition-files-in-the

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

Windows Server 2019
Windows Server 2019
A Microsoft server operating system that supports enterprise-level management updated to data storage.
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  1. Dave Patrick 426.4K Reputation points MVP
    2020-07-16T12:31:11.147+00:00

    I'd probably ask this one over here.
    https://social.technet.microsoft.com/Forums/ie/en-US/home?forum=ieitprocurrentver

    or the IE dev forums moved to stackoverflow
    https://stackoverflow.com/questions/tagged/internet-explorer

    --please don't forget to Accept as answer if the reply is helpful--

    1 person found this answer helpful.
  2. Teemo Tang 11,366 Reputation points
    2020-07-17T07:37:14.6+00:00

    Kindly refer to the workarounds below:
    'WebForm_DoPostBackWithOptions' is undefined in IE11 Preview
    http://stackoverflow.com/questions/18244223/webform-dopostbackwithoptions-is-undefined-in-ie11-preview

    In fact, for IE development question, you’d better ask for help from .NET forum
    https://forums.asp.net/18.aspx/1?Web+Forms

    The reason why we recommend posting appropriately is you will get the most qualified pool of respondents, and other partners who read the forums regularly can either share their knowledge or learn.
    Thanks for your understanding and cooperating

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