Description of problem:
I was setting out of range prefix:
Cluster Network CIDR: 10.128.0.0/22
Cluster Network Host Prefix: 1
Service Network CIDR: 172.30.0.0/16

The UI shows up the message:
The host prefix is a number between size of the cluster network CIDR range (22) and 32.

The issue is that the UI return an incorrect error validation message:
I was expecting to get a range 22 - 25,  since 25 is the minimum addresses allowed for a single host.