RadzenTabs show as bulleted list

When I try to create a tabbed control, the tabs show as a bulleted list instead of tabs.
How can I get these to display as tabs?

        <Radzen.Blazor.RadzenTabsItem Text="aaaaaa">
        <Radzen.Blazor.RadzenTabsItem Text="bbbb">

using Radzen 4.24.2, .Net 7.0

You’ve missed to register the required CSS most probably, check our Getting Started page for reference.