I just installed Dotnetnuke Forum. I cant seem to find the button or link to post a first discussion moreover, the error below keep appearing on my event log at frequent intervals. Anyone got a solution?

Thanks

DefaultDataProvider:DotNetNuke.Data.SqlDataProvider, DotNetNuke

ExceptionGUID:44c11a16-3127-4b77-9987-7e987a12bf2f

InnerException:Error Creating BusinessControllerClass 'DotNetNuke.Modules.Forum.ThreadController, DotNetNuke.Modules.Forum' of module(DNN_Forum) id=(551) in tab(116) and portal(0)

FileName:

FileLineNumber:0

FileColumnNumber:0

Method:System.Activator.CreateInstance

StackTrace:

Message:

System.Exception: Error Creating BusinessControllerClass 'DotNetNuke.Modules.Forum.ThreadController, DotNetNuke.Modules.Forum' of module(DNN_Forum) id=(551) in tab(116) and portal(0) ---> System.ArgumentNullException: Value cannot be null. Parameter name: type    at System.Activator.CreateInstance(Type type, Boolean nonPublic)    at System.Activator.CreateInstance(Type type)    at DotNetNuke.Services.Search.ModuleIndexer.GetSearchModules(Int32 portalId, Boolean allModules)    --- End of inner exception stack trace ---    at DotNetNuke.Services.Search.ModuleIndexer.ThrowLogError(ModuleInfo module, Exception ex)