This is a minor UX bug.
In an invite, the “Set Password” currently has a hint after it which reads:
This is confusing, as while the length is ‘optional’, the field is mandatory.
It is governed by
In contrast, the signup modal omits ‘optional’:
I think that we should make these consistent, with the same title (i.e. ‘Password’), the same text box size (is too short in the invites), and the same text ('i.e. ‘at least x characters’) - without the ‘optional’.