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Editorial Team
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Asked: 2026-05-26T09:48:48+00:00

I am receiving an error loading viewstate on all my webforms after updating to

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I am receiving an error loading viewstate on all my webforms after updating to Visual Studio Service 2010 Pack 1.

Error message:

Failed to load viewstate. The control tree into which viewstate is
being loaded must match the control tree that was used to save
viewstate during the previous request. For example, when adding
controls dynamically, the controls added during a post-back must match
the type and position of the controls added during the initial
request.

Everything was working fine before the upgrade.

Edits:

The problem was actually due to jQuery libaries from google I referenced on my . I removed the runat server on the head, that fixed the problem

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1 Answer

  1. Editorial Team

    I fixed the problem by removing runat=”server” on my master page. That fixed the problem. Masterpage head has some references to Google jQuery files.

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