On the Log In page, press "Forgot your password?" under the Log In button.
A card titled "Forgot Password" opens. Type your email address and press Send Reset Link.
The screen changes to "Check Your Email". (It says "If an account with that email exists…" — that wording is a security measure and appears even for mistyped addresses, so double-check what you typed.)
Open the reset email from Move8 and press its button.
On the "Reset Password" screen, type a new password into New Password (at least 8 characters) and press Set Password.
Log in with the new password.
Things that catch people out
The reset link is valid for 1 hour. Later you'll see "Invalid or expired reset token" — just start again from step 1.
No email after a few minutes? Check spam and confirm you entered the exact address your account uses. If you have several addresses, try each.
Each new request replaces the previous link — always use the newest email.
This flow also works if you never had a password (e.g. your invitation expired) — it sets your first one.