Open via the JIT host: http://jit-app.192-168-1-11.nip.io:4005/insider/jit/. With the demo policy this host is JIT-protected, so a justification interstitial covers the page until you enter a reason. After you grant, the app is usable for the TTL window (30 min) without re-prompting. On a normal host it opens straight away.
You should only see this content after entering a business reason in the JIT prompt. Reload to re-trigger once the grant expires (or clear bdr_jit_grants in extension storage).