Here is the error I am getting, I have 04.08.04:

ModuleId: 491
ModuleDefId: 170
FriendlyName: Wiki
ModuleControlSource: DesktopModules/Wiki/Router.ascx
AssemblyVersion: 04.08.04
PortalID: 0
PortalName: Harold Sohrweide
UserID: 1
UserName: host
ActiveTabID: 88
ActiveTabName: Wiki
RawURL: /Default.aspx?TabId=88
AbsoluteURL: /Default.aspx
AbsoluteURLReferrer: http://harolds.homeip.net/Home/Wiki/tabid/88/Default.aspx
UserAgent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; WOW64; SLCC1; .NET CLR 2.0.50727; .NET CLR 3.0.04506; .NET CLR 3.5.21022)
DefaultDataProvider: DotNetNuke.Data.SqlDataProvider, DotNetNuke.SqlDataProvider
ExceptionGUID: 633e607d-64e6-4132-9164-0237099b5edd
InnerException: C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\root\6035ec19\ebc95af8\App_Web_router.ascx.da103ded.oukiyokd.0.vb(53): error BC32206: Indirect reference is being made to assembly DotNetNuke version 4.8.3.4, which contains 'DotNetNuke.Modules.Wiki.Router'. This Project references a prior version of DotNetNuke version 4.8.2.0. To use 'DotNetNuke.Modules.Wiki.Router', you must replace the reference to DotNetNuke with version 4.8.3.4 or higher.
FileName:
FileLineNumber: 0
FileColumnNumber: 0
Method: System.Web.Compilation.AssemblyBuilder.Compile
StackTrace:
Message: DotNetNuke.Services.Exceptions.ModuleLoadException: C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\root\6035ec19\ebc95af8\App_Web_router.ascx.da103ded.oukiyokd.0.vb(53): error BC32206: Indirect reference is being made to assembly DotNetNuke version 4.8.3.4, which contains 'DotNetNuke.Modules.Wiki.Router'. This Project references a prior version of DotNetNuke version 4.8.2.0. To use 'DotNetNuke.Modules.Wiki.Router', you must replace the reference to DotNetNuke with version 4.8.3.4 or higher. ---> System.Web.HttpCompileException: C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\root\6035ec19\ebc95af8\App_Web_router.ascx.da103ded.oukiyokd.0.vb(53): error BC32206: Indirect reference is being made to assembly DotNetNuke version 4.8.3.4, which contains 'DotNetNuke.Modules.Wiki.Router'. This Project references a prior version of DotNetNuke version 4.8.2.0. To use 'DotNetNuke.Modules.Wiki.Router', you must replace the reference to DotNetNuke with version 4.8.3.4 or higher. at System.Web.Compilation.AssemblyBuilder.Compile() at System.Web.Compilation.BuildProvidersCompiler.PerformBuild() at System.Web.Compilation.BuildManager.CompileWebFile(VirtualPath virtualPath) at System.Web.Compilation.BuildManager.GetVPathBuildResultInternal(VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile) at System.Web.Compilation.BuildManager.GetVPathBuildResultWithNoAssert(HttpContext context, VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile) at System.Web.UI.TemplateControl.LoadControl(VirtualPath virtualPath) at System.Web.UI.TemplateControl.LoadControl(String virtualPath) at DotNetNuke.UI.Skins.Skin.InjectModule(Control objPane, ModuleInfo objModule, PortalSettings PortalSettings) in C:\Inetpub\DotNetNuke\Library\Components\Skins\Skin.vb:line 492 --- End of inner exception stack trace ---
Source:
Server Name: HH29Y61

Harold, it sure looks like you're having at least one DLL issue, can you verify all your DNN dlls are the proper 4.8.4 version?