When you try to run a Web application that isbuilt on the Microsoft .NET Framework, you may receive an error message that resembles the following:
Server Error in '/' Application.Configuration Error
Description: An erroroccurred during the processing of a configuration file required to service thisrequest. Please review the specific error details below and modify yourconfiguration file appropriately.
Parser Error Message: Thismethod cannot be called during the application's pre-start initializationphase.
Source Error:
It's hard to find any information on the topic but in myopinion enableSimpleMembership set to false in appsettings. For me this errorresolved by setting below code.
<appSettings><add key="enableSimpleMembership" value="false" /></appSettings>