You have configured a minimum password length as explained in Password Security, and are now requiring that a user resets their password by selecting PW Update next login in their Login Configuration. However, the message
Your Password must be at least ? characters long. appears when trying to introduce a new password.
This message was displayed when the password was shorter than specified in Password Security in versions earlier than 13.3. In order to fix this, please update to the latest ACRM version.