Signed in as , but you're not on the crew list yet.
Ask an admin to add you from their Crew panel, then refresh.
No email is sent. You'll get a single-use code to pass on — text it, or read it out. They enter that code with this email address and pick their own password.
Leave the deadline blank for work with no fixed date. It won't get lost — jobs climb the list on their own the longer they sit untouched.
Clearing the deadline is fine — the job climbs the list on its own the longer it sits untouched.