How can I enable new users who register on my Wordpress/CiviCRM site to create a password (for a member login)?
As Pete suggests, check the following if a profile is in use:
For the Civi profile under 'Advanced settings' tick either:
WordPress user account registration option?
- Give option, but not required
- Account creation required
In Wordpress under 'Settings' - 'General' you have to ensure that ' Anyone can register' is also enabled.
Once that's done you should be able to preview/test the sign up form (thought the create account options only show if not already logged in or using a private browsing window).