[BUG] Personal Max account blocked from Claude Code - oauth_org_not_allowed (worked yesterday)

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

Claude Code is blocked at login with "Your organization has disabled Claude subscription access for Claude Code" — error oauth_org_not_allowed ("OAuth authentication is currently not allowed for this organization").

I have an active personal Max plan; Chat on claude.ai works fine and consumes my Max quota. I'm the sole Admin of a personal Console org I created myself on a personal Gmail (not a managed company domain), and there is no self-serve UI under Settings > Organization / Members / anywhere in the Console to enable Claude Code subscription access for a personal-plan org.

No ANTHROPIC_API_KEY is set anywhere (session/User/Machine all empty). It worked yesterday and broke today with no change on my end; my Max subscription renewed via Google Play ~2 days prior, which looks like the timing trigger. Fails identically on two separate laptops. Related to #63685, #63621, #63886.

What Should Happen?

Claude Code should authenticate with my active Max subscription and start a session, as it did yesterday.

Error Messages/Logs

Your organization has disabled Claude subscription access for Claude Code · Use an Anthropic API key instead, or ask your admin to enable access

403 permission_error: "OAuth authentication is currently not allowed for this organization." (oauth_org_not_allowed)

Steps to Reproduce

1. Sign in to Claude Code with a personal Max account that also owns a personal Console organization.
2. Run claude login and select "Claude account with subscription".
3. Start any session (type "hi").
4. Error appears: "Your organization has disabled Claude subscription access for Claude Code" (oauth_org_not_allowed).

Already tried, none resolve it: claude logout / claude login (subscription only) 5x; claude update + full terminal restart; confirmed no ANTHROPIC_API_KEY in any scope; reproduced on two laptops.

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

Claude 1.12603.1 (3df4fd) 2026-06-11T16:57:36.000Z

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

Console Org ID available on request.