You'll need to be logged-in to the Chameleon site to enable any editing with the Chameleon Editor. Log in here.
Chameleon is passwordless (to avoid remembering or managing passwords).
You can login using your Google for Work email account, or a magic link to your email.
The magic link expires after 1 click or 24 hours (whichever is first) for security purposes. If that happens, simply request a new one.
Once you are logged-in you'll stay logged-in until you clear cookies or use incognito.