Continue with nearby guides in the same topic to rule out adjacent causes faster.
Claude supports 3 login methods: Google OAuth, Apple ID, and email+password — using the wrong method for your account type is the single most common cause of login failure. Start by clearing cookies for claude.ai, trying incognito mode, and confirming you are using the exact sign-in method you registered with. Verification code delays average under 2 minutes; check your spam folder for emails from noreply@anthropic.com and wait 5 minutes before requesting a new code.
Claude's desktop app login failures are usually caused by a corrupted app session, outdated app version, or a network issue specific to the desktop app's built-in browser. Try signing out completely and back in, then update the app to the latest version. If the app login continues to fail, use claude.ai in a regular web browser as a working alternative while you troubleshoot.
Mobile Claude login failures are most commonly fixed by force-closing and reopening the app, then signing out and back in. If the login screen does not load, check your internet connection and update the app to the latest version — outdated mobile apps frequently have authentication issues. Google and Apple login on mobile requires the native app (not a webview) to complete the OAuth handshake properly.
Claude login stuck on a callback or redirect URL means the OAuth handshake completed on the provider side (Google/Apple) but the redirect back to Claude failed. Clear cookies for claude.ai, disable extensions that block redirects, and try the login again in incognito mode. If the URL in your browser ends with '/callback' or '/oauth' and never changes, that is the stuck point — a fresh session with no extensions resolves this in most cases.
Apple ID login failures on Claude are almost always caused by a blocked OAuth popup or a stale browser session. Open Claude in incognito mode, allow popups for claude.ai, and try signing in with Apple again — this resolves the problem in most cases. If you used iCloud's Hide My Email feature during signup, confirm the relay address is still active and forwarding to your real inbox.
Claude is available in most countries but is restricted in a handful of regions due to legal and compliance requirements. If you see a 'not available in your region' message, this is a genuine geographic restriction that cannot be bypassed through normal troubleshooting. However, if you are receiving the error despite being in a supported country, the issue is likely your IP address appearing to be in a restricted region — disabling your VPN or switching to a different network usually resolves this.