Server Error in ‘/’ Application – No relevant source lines

L’errore :

Server Error in ‘/’ Application.
Configuration Error
Description: An error occurred during the processing of a configuration file required to service this request. Please review the specific error details below and modify your configuration file appropriately.
Parser Error Message: The connection name ‘LocalSqlServer’ was not found in the applications configuration or the connection string is empty.
Source Error:  [No relevant source lines]

è un problema a livello di permessi. L’utente utilizzato in IIS non ha i diritti “sufficienti” ad accedere alle cartelle di C:WindowsMicrosoft.NETFramework
Inoltre è necessario controllare anche i permessi sulla ROOT del sito web

Source Error No relevant source lines, Server Error in Application No relevant source lines