Could not load file or assembly 'CookComputing.XmlRpcV2, Version=2.5.0.0, Culture=neutral, PublicKeyToken=a7d6e17aa302004d' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)

Here is the Stack Trace:

[FileLoadException: Could not load file or assembly 'CookComputing.XmlRpcV2, Version=2.5.0.0, Culture=neutral, PublicKeyToken=a7d6e17aa302004d' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)]

System.Reflection.RuntimeAssembly.GetExportedTypes(RuntimeAssembly assembly, ObjectHandleOnStack retTypes) +0

System.Reflection.RuntimeAssembly.GetExportedTypes() +38

YAF.Core.AssemblyExtensions.b__0(Assembly a) +44

System.Linq.WhereSelectListIterator`2.MoveNext() +110

YAF.Core.AssemblyExtensions.FindModules(IEnumerable`1 assemblies) +318

YAF.Core.YafBaseContainerModule.RegisterExternalModules() +163

YAF.Core.YafBaseContainerModule.Configure(IComponentRegistry componentRegistry) +198

Autofac.ContainerBuilder.Build(IComponentRegistry componentRegistry, Boolean excludeDefaultModules) +119

Autofac.ContainerBuilder.Build(ContainerBuildOptions options) +53

YAF.Core.GlobalContainer.CreateContainer() +104

YAF.Core.GlobalContainer.get_Container() +72

YAF.Core.YafTaskModule.Init(HttpApplication httpApplication) +122

System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr appContext, HttpContext context, MethodInfo[] handlers) +517

System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr appContext, HttpContext context) +194

System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context) +339

System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext) +253

[HttpException (0x80004005): Could not load file or assembly 'CookComputing.XmlRpcV2, Version=2.5.0.0, Culture=neutral, PublicKeyToken=a7d6e17aa302004d' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)]

System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +9089964

System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +97

System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +256

I could really use some help. Thanks.

In my experience - (in general - not so much applying to YAF or DNN), you can control which version is being looked for using the web.config --

The question would be which version was newer - DNN's or YAF's? At that point, I would probably try to update the web.config and dll file with which ever one was of a newer version. I can't say that you need to do this for your DNN or YAF install, or if it would cause more problems than it's worth. Again - tha_watcha will have more advice with that as he's the YAF to DNN guru here 🙂 I just wanted to get you the 'quick fix' to get the site back online.

This issue is caused by other Modules which uses the same dll but other Versions. It is the DNN Blog Module which causes the Issue (But this should be fixed in the most recent Version of the Blog Module).

But it could be also other Modules that could be using that dll, so this issue would only reoccur when you install other different Modules.