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Problem

Paragon email addresses must be unique across all Paragon accounts, not just within one team. If the invited person already created a Paragon account (including a trial) with that same email, clicking Join Now in a new team invite can fail. The dashboard often shows a generic 404 instead of a clear “email already in use” message.

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You may see

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How to fix it

  • Confirm the email isn’t already on another Paragon account. If the invited person ever signed up (including a trial) with that email, they need to free it before they can accept a new team invite.
  • Free the email on the old account. Log in to the original account → Account Settings → change the email to something like [email protected].
  • Have a team admin check Settings → Team members for a pending invite to that email. If there’s one, click Resend. If there isn’t one, send a new invite to the same work email.
  • Accept the new invite in an incognito/private window. Use the latest email only. Don’t reuse an old Join Now link.

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If it still fails

Open the invite link, then:
  1. Open Developer Tools (Chrome: right-click → Inspect, or Cmd+Option+I / Ctrl+Shift+I)
  2. Go to the Network tab
  3. Check console logs
  4. Find any request that is red or has status 4xx (often /teams/.../invite/... or /api/auth/accept-invite)
  5. Share that with [email protected] and one of our support team can investigate it further for you.