It looks as if your web.config file has not specified a default data provider. This should be set out of the box unless changes were made.
<DataProvider defaultProvider="SqlDataProvider">
<providers>
<add name="SqlDataProvider" type="BugNET.Providers.DataProviders.SqlDataProvider, BugNET.Providers.SqlDataProvider" connectionStringName="BugNET" providerPath="~\Providers\DataProviders\SqlDataProvider\"/>
</providers>
</DataProvider>