No-IP Group doesn't update

[CyberCyclone]

When using the Group update feature for no-ip, it comes up with

Do you wish to have them all updated?[N] (y/N) n

It then doesn't update any of the domains in that group. Here's my config:

USERNAME='groupname:username'

PASSWORD='password'

# Your hostname, group name, or a comma-delimited list of a mix of them.
DOMAINS='groupname'

# Examples: 5 m, 5 h, 5 d. Minimum is 5 minutes.
INTERVAL='5m'

'groupname' is the group name setup in no-ip.