Remote Control fails with 403 on Max 5x plan (was working previously)

Bug Description

claude remote-control fails with a 403 error on a Max 5x subscription. This was working previously (earlier this week) and stopped working today without any configuration changes.

Error Message

Error: Registration: Access denied (403): Request not allowed. Check your organization permissions.

Environment

• Claude Code version: 2.1.76
• OS: macOS (Darwin 22.6.0)
• Plan: Max 5x (personal, not Team/Enterprise)
• Auth: logged in via /login (claude.ai)

Steps to Reproduce

1. Run claude remote-control or use /remote-control inside a session
2. Immediately fails with 403

Expected Behavior

Remote Control session should start successfully, as it did previously on the same plan and configuration.

Notes

• /login session is active and valid
• Regular Claude Code sessions work fine
• No organization/team restrictions — this is a personal Max 5x account
• Network proxy is configured and working (GitHub, API calls all succeed)
• Relogging (/logout + /login) does not resolve the issue