I get error: Your password must be at least 0 characters long.

A. If you have enabled the strong password filter (for information onthis see Q. How do I enable strong password filtering?) but your domain account policy has no passwordrestrictions and allows blank passwords then you will get the error:

Your password must be at least 0 characters long. Your new passwordcannot be the same as any of your previous 0 passwords. Also, your site mayrequire passwords that must be a combination of upper case, lower case,numbers, and non-alphanumeric characters. Type a password which meets theserequirements in both text boxes.

To resolve this you will need to turn off the secure password filter

Alternatively turn off the ability to have blank passwords: