PolicyException: autorisations requises ne peuvent pas être acquises - qu'est-ce que cette erreur signifie

Question

obtenu cette erreur lorsque vous essayez de charger une page ASPX:

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: 

[PolicyException: Required permissions cannot be acquired.] 
    System.Security.SecurityManager.ResolvePolicy(Evidence evidence, PermissionSet reqdPset, PermissionSet optPset, PermissionSet denyPset, PermissionSet& denied, Boolean checkExecutionPermission) +2770052 
    System.Security.SecurityManager.ResolvePolicy(Evidence evidence, PermissionSet reqdPset, PermissionSet optPset, PermissionSet denyPset, PermissionSet& denied, Int32& securitySpecialFlags, Boolean checkExecutionPermission) +57 

[FileLoadException: Could not load file or assembly 'SQLite.NET, Version=0.21.1869.3794, Culture=neutral, PublicKeyToken=c273bd375e695f9c' or one of its dependencies. Failed to grant minimum permission requests. (Exception from HRESULT: 0x80131417)] 
    System.Reflection.Assembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, Assembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection) +0 
    System.Reflection.Assembly.nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, Assembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection) +54 
    System.Reflection.Assembly.InternalLoad(AssemblyName assemblyRef, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection) +211 
    System.Reflection.Assembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection) +141 
    System.Reflection.Assembly.Load(String assemblyString) +25 
    System.Web.Configuration.CompilationSection.LoadAssemblyHelper(String assemblyName, Boolean starDirective) +32 

[ConfigurationErrorsException: Could not load file or assembly 'SQLite.NET, Version=0.21.1869.3794, Culture=neutral, PublicKeyToken=c273bd375e695f9c' or one of its dependencies. Failed to grant minimum permission requests. (Exception from HRESULT: 0x80131417)] 
    System.Web.Configuration.CompilationSection.LoadAssemblyHelper(String assemblyName, Boolean starDirective) +596 
    System.Web.Configuration.CompilationSection.LoadAllAssembliesFromAppDomainBinDirectory() +211 
    System.Web.Configuration.CompilationSection.LoadAssembly(AssemblyInfo ai) +46 
    System.Web.Compilation.BuildManager.GetReferencedAssemblies(CompilationSection compConfig) +177 
    System.Web.Compilation.BuildProvidersCompiler..ctor(VirtualPath configPath, Boolean supportLocalization, String outputAssemblyName) +185 
    System.Web.Compilation.ApplicationBuildProvider.GetGlobalAsaxBuildResult(Boolean isPrecompiledApp) +230 
    System.Web.Compilation.BuildManager.CompileGlobalAsax() +49 
    System.Web.Compilation.BuildManager.EnsureTopLevelFilesCompiled() +462 

[HttpException (0x80004005): Could not load file or assembly 'SQLite.NET, Version=0.21.1869.3794, Culture=neutral, PublicKeyToken=c273bd375e695f9c' or one of its dependencies. Failed to grant minimum permission requests. (Exception from HRESULT: 0x80131417)] 
    System.Web.Compilation.BuildManager.ReportTopLevelCompilationException() +57 
    System.Web.Compilation.BuildManager.EnsureTopLevelFilesCompiled() +612 
    System.Web.Hosting.HostingEnvironment.Initialize(ApplicationManager appManager, IApplicationHost appHost, IConfigMapPathFactory configMapPathFactory, HostingEnvironmentParameters hostingParameters) +644 

[HttpException (0x80004005): Could not load file or assembly 'SQLite.NET, Version=0.21.1869.3794, Culture=neutral, PublicKeyToken=c273bd375e695f9c' or one of its dependencies. Failed to grant minimum permission requests. (Exception from HRESULT: 0x80131417)] 
    System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +3465427 
    System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +69 
    System.Web.HttpRuntime.ProcessRequestInternal(HttpWorkerRequest wr) +279 

Answer 1

Avez-vous l'application Web configuré en tant que moyen d'affectation spéciale et l'ensemble de SQLite.NET nécessite une confiance totale?

Voir si vous ajoutez ceci à votre web.config le fixe:

<system.web> 
    <securityPolicy> 
     <trust level="Full" /> 
    </securityPolicy> 

... 
</system.web> 

Ou si vous avez déjà la balise de confiance, changer le niveau total.

Answer 2

Si slolife réponse ne fonctionne pas, vous pouvez également essayer de msdn (ASP.NET Trust Levels and Policy Files):

<system.web> 
    <securityPolicy> 
     <trustLevel name="Full" policyFile="internal"/> 
    </securityPolicy> 
</system.web>