I just upgraded YAF to 2.31.66 and now when I try to go to view the configuration views, I get the following two exceptions.

DNN Platform: 9.5.0
DNN YAF.NET: 2.31.66

DotNetNuke.Framework.PageBase - An error has occurred while loading page.
Microsoft.CSharp.RuntimeBinder.RuntimeBinderException: 'System.Dynamic.ExpandoObject' does not contain a definition for 'VersionDate'
at CallSite.Target(Closure , CallSite , Object )
at System.Dynamic.UpdateDelegates.UpdateAndExecute1[T0,TRet](CallSite site, T0 arg0)
at YAF.Pages.Admin.admin.ShowUpgradeMessage()
at System.EventHandler.Invoke(Object sender, EventArgs e)
at System.Web.UI.Control.OnLoad(EventArgs e)
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)


DotNetNuke.Services.Exceptions.Exceptions - ~/Default.aspx?tabid=172&error=%27System.Dynamic.ExpandoObject%27+does+not+contain+a+definition+for+%27VersionDate%27&content=0
Microsoft.CSharp.RuntimeBinder.RuntimeBinderException: 'System.Dynamic.ExpandoObject' does not contain a definition for 'VersionDate'
at CallSite.Target(Closure , CallSite , Object )
at System.Dynamic.UpdateDelegates.UpdateAndExecute1[T0,TRet](CallSite site, T0 arg0)
at YAF.Pages.Admin.admin.ShowUpgradeMessage()
at System.EventHandler.Invoke(Object sender, EventArgs e)
at System.Web.UI.Control.OnLoad(EventArgs e)
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

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I also just found this exception in the YAF event log table. The DLL it's complaining about is not in the install package though.

System.IO.FileNotFoundException: Could not load file or assembly 'System.Numerics.Vectors, Version=4.1.4.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.
File name: 'System.Numerics.Vectors, Version=4.1.4.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'
at System.SpanHelpers.SequenceEqual(Byte& first, Byte& second, NUInt length)
at System.MemoryExtensions.Equals(ReadOnlySpan`1 span, ReadOnlySpan`1 other, StringComparison comparisonType)
at ServiceStack.Text.Json.JsonTypeSerializer.EatValue(ReadOnlySpan`1 value, Int32& i) in C:\YAFNET\yafsrc\ServiceStack\ServiceStack.Text\Json\JsonTypeSerializer.cs:line 732
at ServiceStack.Text.Common.DeserializeDictionary`1.ParseJsonObject(ReadOnlySpan`1 value) in C:\YAFNET\yafsrc\ServiceStack\ServiceStack.Text\Common\DeserializeDictionary.cs:line 124
at ServiceStack.Text.Common.DeserializeListWithElements`2.ParseGenericList(ReadOnlySpan`1 value, Type createListType, ParseStringSpanDelegate parseFn) in C:\YAFNET\yafsrc\ServiceStack\ServiceStack.Text\Common\DeserializeListWithElements.cs:line 194
at ServiceStack.Text.Common.DeserializeList`2.<>c__DisplayClass7_0.b__0(ReadOnlySpan`1 value) in C:\YAFNET\yafsrc\ServiceStack\ServiceStack.Text\Common\DeserializeListWithElements.cs:line 284
at ServiceStack.Text.Json.JsonReader`1.Parse(ReadOnlySpan`1 value) in C:\YAFNET\yafsrc\ServiceStack\ServiceStack.Text\Json\JsonReader.Generic.cs:line 110
at ServiceStack.Text.Json.JsonReader`1.Parse(String value) in C:\YAFNET\yafsrc\ServiceStack\ServiceStack.Text\Json\JsonReader.Generic.cs:line 83
at ServiceStack.Text.JsonSerializer.DeserializeFromString[T](String value) in C:\YAFNET\yafsrc\ServiceStack\ServiceStack.Text\JsonSerializer.cs:line 45
at ServiceStack.DynamicJson.YieldMember(String name, Object& result) in C:\YAFNET\yafsrc\ServiceStack\ServiceStack.Text\Pcl.Dynamic.cs:line 146
at CallSite.Target(Closure , CallSite , Object )
at System.Dynamic.UpdateDelegates.UpdateAndExecute1[T0,TRet](CallSite site, T0 arg0)
at YAF.Core.Services.LatestInformation.GetLatestVersion()

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Will Strohl
CEO & Founder, Upendo Ventures
UpendoVentures.com 

Could not load file or assembly 'System.Numerics.Vectors, Version=4.1.4.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.

This DLL version doesn't appear to exist either...

https://www.nuget.org/packages/System.Numerics.Vectors/ 

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Could not load file or assembly 'System.Numerics.Vectors, Version=4.1.4.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.

This DLL version doesn't appear to exist either...

https://www.nuget.org/packages/System.Numerics.Vectors/ 

Looks like i forgot to include in in the installer. Will be fixed with 2.31.07

Great! Thanks for the quick reply. Do you know if that will resolve the other exception I'm seeing and reported in the original post as well?

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Great! Thanks for the quick reply. Do you know if that will resolve the other exception I'm seeing and reported in the original post as well?

Yes, it will both are the same issue. New release on Sunday