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  • Hundebol 167 posts 314 karma points
    Oct 13, 2016 @ 09:44

    YSOD after downgrade

    Hi guys,

    I tried to downgrade nuPIckers from 1.5.3 to 1.4.1 but now my site is really messed up with the following YSOD error

    Attempt by security transparent method 'ClientDependency.Core.Mvc.HtmlHelperExtensions.RequiresCss(System.Web.Mvc.HtmlHelper, System.String, System.String)' to access security critical type 'System.Web.Mvc.HtmlHelper' failed.
    Assembly 'ClientDependency.Core.Mvc, Version=, Culture=neutral, PublicKeyToken=null' is marked with the AllowPartiallyTrustedCallersAttribute, and uses the level 2 security transparency model.  Level 2 transparency causes all methods in AllowPartiallyTrustedCallers assemblies to become security transparent by default, which may be the cause of this exception.

    What does this mean and what can i do about it?

    best regards

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