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If you’re having trouble signing in to ZeroTwo, this guide covers the most common login and account access problems.
ZeroTwo supports both email/password login and OAuth via Google and GitHub. The troubleshooting steps differ depending on which method you use.

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Login Troubleshooting

If you use email/password login:
  1. Go to the ZeroTwo login page at zerotwo.ai
  2. Click “Forgot password?” below the login form
  3. Enter the email address associated with your account
  4. Check your inbox for a password reset link (check spam/junk if it doesn’t appear within a few minutes)
  5. Click the link and set a new password
If you use OAuth (Google or GitHub):You don’t have a ZeroTwo password — your account is authenticated entirely through Google or GitHub. Simply click the “Continue with Google” or “Continue with GitHub” button on the login page. If you’ve forgotten your Google or GitHub password, use those platforms’ own account recovery flows.
Not sure which login method you used? Try the OAuth buttons first — if your email is recognized by Google or GitHub, that’s likely how you signed up.
OAuth login failures are usually caused by browser-level interference. Try these steps in order:
  1. Clear browser cookies for zerotwo.ai and the OAuth provider (accounts.google.com or github.com). Go to your browser’s cookie settings, search for these domains, and delete them.
  2. Disable browser extensions — especially ad blockers, cookie managers, privacy tools, and VPN extensions. These can intercept OAuth redirects and break the login flow.
  3. Try an incognito/private window — extensions are disabled by default in incognito mode. If login works in incognito, an extension is the cause.
  4. On mobile: open zerotwo.ai in your device’s default browser (Safari on iOS, Chrome on Android) rather than an in-app browser. In-app browsers (inside the Twitter app, Gmail app, etc.) often block third-party cookies required for OAuth.
  5. Check that pop-ups are allowed — some OAuth flows open a pop-up window. Ensure pop-ups are not blocked for zerotwo.ai in your browser settings.
If none of these steps work, contact reed@zerotwo.ai with your browser, OS, and the exact error message shown.
Business workspace invitations have a few requirements:
  • Use the correct email address. The invite link is tied to the specific email your admin sent it to. If you’re trying to accept with a different email, it won’t work.
  • Check the invite expiry. Invites expire after 7 days. If your invite link has expired, ask your workspace admin to resend it from /admin/members.
  • You need a ZeroTwo account. If you don’t have one yet, sign up at zerotwo.ai using the same email the invite was sent to before clicking the invite link.
  • Don’t be logged into a different account. If you’re already logged in to ZeroTwo with a different email, log out first (Settings → Account → Sign Out), then accept the invite.
Invite links are single-use and email-specific. Forwarding an invite link to a colleague will not work for them.
If you’ve lost access to your 2FA authenticator app:
  1. Use your backup codes — these were generated when you first set up 2FA in ZeroTwo. If you saved them, enter one of the unused backup codes on the 2FA verification screen.
  2. Each backup code can only be used once. If you have remaining codes, use one to log in, then go to Settings → Security → Two-Factor Authentication to reconfigure 2FA with your new authenticator app.
If you’ve lost both your authenticator app and your backup codes:Contact ZeroTwo support at reed@zerotwo.ai for account recovery. You’ll need to verify your identity. Include:
  • The email address on your account
  • Any billing information or order confirmation numbers that can help verify ownership
For security reasons, ZeroTwo cannot bypass 2FA without identity verification. Recovery may take 1–2 business days.
If ZeroTwo is showing the wrong account or you have multiple ZeroTwo accounts:
  1. Go to Settings → Account → Sign Out to log out of the current account
  2. Return to the ZeroTwo login page
  3. Log in with the correct email/password or the correct OAuth provider
  4. If you’re not sure which OAuth provider is linked to your account, try each one — Google and GitHub
To prevent this in the future: ZeroTwo associates your account with the email used at signup. If you signed up with Google, always use the Google login button. If you signed up with email/password, always use email/password.
ZeroTwo does not currently support merging multiple accounts. If you have duplicate accounts, contact reed@zerotwo.ai for assistance.
This error means an account with that email address already exists in ZeroTwo. You have two options:
  1. Log in instead of signing up. Go to the login page and use the email/password form or the OAuth button linked to that email.
  2. Use “Forgot password?” if you don’t remember the password set for that email address.
If you’re sure you never signed up with that email:It’s possible you signed up using an OAuth provider (Google/GitHub) with the same email — try both OAuth buttons. If you still can’t access the account, contact reed@zerotwo.ai.
Redirect loops and infinite loading on the login page are almost always caused by stale cookies or browser state. Follow these steps:
  1. Clear cookies and site data for zerotwo.ai in your browser settings (search for zerotwo.ai in your browser’s privacy/cookies panel and delete all data)
  2. Disable browser extensions — try in an incognito window first to confirm extensions are the cause
  3. Try a completely different browser — if Chrome is looping, try Firefox or Safari
  4. Check network/firewall settings — corporate or school networks sometimes block zerotwo.ai. Check if the site appears on any blocklist in your network settings. Try on a mobile hotspot to rule this out.
  5. Flush DNS cache (Mac: sudo dscacheutil -flushcache, Windows: ipconfig /flushdns)
If the issue persists on multiple browsers and networks, email reed@zerotwo.ai.

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Still Having Trouble?

Contact ZeroTwo support at reed@zerotwo.ai. Include your browser, OS, and any error message text for the fastest resolution.