Dear All,
During instalation I have got this error. How can help me?
To complete this wizard you must know some information regarding your database server ("connection string"). Please contact your ISP if necessary. If you're installing on a local machine or server you might need information from your System Admin.
Setup failed: System.InvalidOperationException: Sequence contains more than one element at System.Linq.Enumerable.Single[TSource](IEnumerable`1 source) at System.Data.Objects.ELinq.ObjectQueryProvider.<GetElementFunction>b__3[TResult](IEnumerable`1 sequence) at System.Data.Objects.ELinq.ObjectQueryProvider.ExecuteSingle[TResult](IEnumerable`1 query, Expression queryRoot) at System.Data.Objects.ELinq.ObjectQueryProvider.System.Linq.IQueryProvider.Execute[S](Expression expression) at System.Data.Entity.Internal.Linq.DbQueryProvider.Execute[TResult](Expression expression) at System.Linq.Queryable.Single[TSource](IQueryable`1 source) at Nop.Services.Installation.InstallationService.InstallSettings() in d:\NEW GAGAT WEB SITE\Libraries\Nop.Services\Installation\InstallationService.cs:line 4510 at Nop.Services.Installation.InstallationService.InstallData(String defaultUserEmail, String defaultUserPassword, Boolean installSampleData) in d:\NEW GAGAT WEB SITE\Libraries\Nop.Services\Installation\InstallationService.cs:line 9233 at Nop.Web.Controllers.InstallController.Index(InstallModel model) in d:\NEW GAGAT WEB SITE\Presentation\Nop.Web\Controllers\InstallController.cs:line 430
