ankio ho lo stesso errore nonostante abbia configurato il file Web.Config in questo modo:

<configuration>
<system.web>
<customErrors defaultRedirect="error/error.aspx" mode="RemoteOnly">
<error statusCode="404" redirect="error/404.aspx" />
<error statusCode="500" redirect="error/500.aspx" />
</customErrors>
[...]
</system.web>
</configuration>

:master: