Team access depends on your current membership. You can lose access after removal, an account change, or deletion of the team. Signing in with another email or social connection can also put you in a different account.
Ask a team owner to confirm your membership and the email on the invitation. Do not create a replacement team just to recover the old team's numbers: a new team does not inherit them. If an owner confirms access but the team is still missing, contact support with your account email and the team's name. Never send a sign-in code or API key.