Your encryption passphrase is separate from your password and never leaves your browser. You'll need it on each new browser.

Opened from a team creation link, no key needed.

Your encryption passphrase is separate from your password and never leaves your browser. You'll need it on each new browser.

Opened from an invite link.

New browser: enter your encryption passphrase to unlock your team's data.

Set an encryption passphrase. Your team's key is currently protected by your password, which the server sees at login. A passphrase never leaves your browser. You'll need it on each new browser.

Without your passphrase this key is lost. You can start over with a new key and passphrase, then a teammate will have to grant you access again from the Team page.