Error when building solution for v2.5

I've downloaded the source for V2.5 but when I build my project I get the following error:

{"'Guests' role could not be loaded"}

Nop.Core.NopException was unhandled by user code  Message='Guests' role could not be loaded  Source=Nop.Services  StackTrace:       at Nop.Services.Customers.CustomerService.InsertGuestCustomer() in C:\Visual Studio 2010\Projects\nopCommerce 2.5\Libraries\Nop.Services\Customers\CustomerService.cs:line 385       at Nop.Web.Framework.WebWorkContext.GetCurrentCustomer() in C:\Visual Studio 2010\Projects\nopCommerce 2.5\Presentation\Nop.Web.Framework\WebWorkContext.cs:line 117       at Nop.Web.Framework.WebWorkContext.get_CurrentCustomer() in C:\Visual Studio 2010\Projects\nopCommerce 2.5\Presentation\Nop.Web.Framework\WebWorkContext.cs:line 185       at Nop.Web.MvcApplication.SetWorkingCulture() in C:\Visual Studio 2010\Projects\nopCommerce 2.5\Presentation\Nop.Web\Global.asax.cs:line 201       at Nop.Web.MvcApplication.Application_AuthenticateRequest(Object sender, EventArgs e) in C:\Visual Studio 2010\Projects\nopCommerce 2.5\Presentation\Nop.Web\Global.asax.cs:line 146       at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()       at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)  InnerException: 

Anyone having this issue?

Bumping

Seems lik the issue is caused when I copy my Settings.txt file from my old project it blows up on this statement. Should I not copy the file over from my old project?

The Settings.txt has connection string to database.  What version of nopC is your old DB?

Did you remove the Guest role?  
SELECT * FROM [your_database_name].[dbo].[CustomerRole]

New York wrote:

Correct about the connection string in the settings file. I was on version 2.4 source and no I have removed anything.