Remote cloud containers stuck at 'Setting up a cloud container' — Missing queryFn: sessions_api_list_sessions

Environment

• Mac: macOS Tahoe 26.3.1 (25D771280a), Claude desktop 1.15200.0 (250bae), built 2026-06-23
• iOS: iOS 26.5, Claude v1.260618.1 (27978583058)
• Network: Both devices are on the same local network. No VPN on either device.

Symptom

When initiating a remote session from the iOS app, the desktop shows a "Setting up a cloud container" progress panel with four steps. The first step spins indefinitely and the remaining three never start:

1. Setting up a cloud container — spinner active, never completes
2. Clone repository — unstarted (empty circle)
3. Run setup script — unstarted (empty circle)
4. Start Claude Code — unstarted (empty circle)

The session never progresses past step 1. No error is shown in the UI — it just spins until manually dismissed.

Root cause from logs

~/Library/Logs/Claude/claude.ai-web.log shows this error repeating every ~10 minutes all day:

Missing queryFn: '["sessions_api_list_sessions",{"orgUuid":"..."}]'

The sessions API query function is never registered, so the app cannot list or provision remote sessions at all.

Also seen repeatedly:

404 Session not found — POST /v1/code/sessions/<session_id>/mark_read
{"error":{"message":"Session <id> not found","type":"not_found_error"}}

Steps to reproduce

1. Open Claude on iOS
2. Start a new remote/cloud session targeting the Mac desktop
3. Desktop shows "Setting up a cloud container" and hangs indefinitely

Attempted fixes

• Full app quit and relaunch
• Cleared ~/Library/Application Support/Claude/Cache and Code Cache directories

Neither resolved the issue.