I am getting some strange error, right after I upgrade to 11.5.
Server Error in '/' Application.
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: Provider must implement the class 'System.Web.Security.RoleProvider'.
This is the web.config section:
[Pasting files is not allowed][Pasting files is not allowed]
I think - thought I'm not sure, the SqlServerRoleProvider should be this
<add name="SqlServerRoleProvider" connectionStringName="EPiServerDB" applicationName="CommerceDev" type="System.Web.Security.SqlRoleProvider, System.Web, Version=184.108.40.206, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" />
So you are using an older version which might not work correctly.