# Missing slot content

Learn how to provide default slot content for server rendering.

If you see the error below when using the [`useContent`](/reference/sdk/react/api/hooks/use-content) hook or [`<Slot>`](/reference/sdk/react/api/components/slot) component, you probably forgot to specify an [initial content](/reference/sdk/react/api/components/personalization#initial-prop).

> **Error**
>
> The initial content is required for server-side rendering (SSR).

The initial content is required to pre-render the content on the server, as the actual content is fetched on the client side when using hooks or components.

For full server-side rendering support, use the [`fetchContent`](/reference/sdk/react/api/functions/fetch-content) function or one of our framework-specific integrations, like the [Next.js SDK](/reference/sdk/nextjs).