Frequent exceptions because of a mistake in the file
"nopCommerce\Libraries\Nop.DataAccess.SqlServer\Audit\SQLLogProvider.cs"
Fix: comment line 171 :)
db.AddOutParameter(dbCommand, "LogID", DbType.Int32, 0);
DBLog dbItem = DBLogProvider.Provider.InsertLog((int)LogType, Severity, Message,
exception == null ? String.Empty : exception.ToString(), IPAddress, CustomerID, PageURL, CreatedOn);