Runtime SecurityError: localStorage access denied in Next.js (LiveKit agent-control-bar)

[edengby]

When using @livekit/components-react inside a Next.js (App Router) project, the app throws a runtime error related to localStorage access:

Runtime SecurityError
Failed to read the 'localStorage' property from 'Window': Access is denied for this document.

This occurs inside:

components/livekit/agent-control-bar/hooks/use-agent-control-bar.ts (78:31)

Screenshot

Environment

• Next.js: 15.5.9 (Turbopack)
• React: 19

Is this a known issue with @livekit/components-react in Next.js App Router?
Is there a recommended pattern for using AgentControlBar in SSR environments?