Hi John

I've just done some changes for a clients dnn site, after which I made a backup of the database and files and sent them over, they said that they have done a restore on their database and when they try and run the app they get this error:

Server Error in '/intranet' Application.

------------------------------------------------------------------------


Value cannot be null.
Parameter name: type
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.ArgumentNullException: Value cannot be null.
Parameter name: type
Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Stack Trace:
[ArgumentNullException: Value cannot be null.
Parameter name: type]
   System.Activator.CreateInstance(Type type, Boolean nonPublic) +2768503
   DotNetNuke.Framework.Reflection.CreateObject(String ObjectProviderType, String ObjectProviderName, String ObjectNamespace, String ObjectAssemblyName, Boolean UseCache) +582
   DotNetNuke.Framework.Reflection.CreateObject(String ObjectProviderType, String ObjectNamespace, String ObjectAssemblyName) +17
   DotNetNuke.Security.Membership.Data.DataProvider.CreateProvider() +38
   DotNetNuke.Security.Membership.Data.DataProvider..cctor() +13

[TypeInitializationException: The type initializer for 'DotNetNuke.Security.Membership.Data.DataProvider' threw an exception.]
   DotNetNuke.Security.Membership.Data.DataProvider.Instance() +0
   DotNetNuke.Security.Membership.AspNetMembershipProvider..cctor() +5

[TypeInitializationException: The type initializer for 'DotNetNuke.Security.Membership.AspNetMembershipProvider' threw an exception.]

[TargetInvocationException: Exception has been thrown by the target of an invocation.]
   System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandle& ctor, Boolean& bNeedSecurityCheck) +0
   System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean fillCache) +103
   System.RuntimeType.CreateInstanceImpl(Boolean publicOnly, Boolean skipVisibilityChecks, Boolean fillCache) +261
   System.Activator.CreateInstance(Type type, Boolean nonPublic) +66
   DotNetNuke.Framework.Reflection.CreateObject(String ObjectProviderType, String ObjectProviderName, String ObjectNamespace, String ObjectAssemblyName, Boolean UseCache) +582
   DotNetNuke.Security.Membership.MembershipProvider.CreateProvider() +38
   DotNetNuke.Security.Membership.MembershipProvider..cctor() +13

[TypeInitializationException: The type initializer for 'DotNetNuke.Security.Membership.MembershipProvider' threw an exception.]
   DotNetNuke.Security.Membership.MembershipProvider.Instance() +0
   DotNetNuke.Entities.Users.UserController..cctor() +5

[TypeInitializationException: The type initializer for 'DotNetNuke.Entities.Users.UserController' threw an exception.]
   DotNetNuke.Entities.Users.UserController.GetUserCountByPortal(Int32 portalId) +0
   DotNetNuke.Entities.Portals.PortalInfo.get_Users() +17
   DotNetNuke.Entities.Portals.PortalSettings.GetPortalSettings(Int32 TabId, PortalAliasInfo objPortalAliasInfo) +1302
   DotNetNuke.Entities.Portals.PortalSettings..ctor(Int32 tabId, PortalAliasInfo objPortalAliasInfo) +83
   DotNetNuke.HttpModules.UrlRewriteModule.OnBeginRequest(Object s, EventArgs e) +2848
   System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +92
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +64

Does this look familiar, any ideas?

Cheers

Mark