OpenShift on OpenStack IPI installation fails with misconfigured install-config file

Issue

• The install-config is consumed but fails to create cluster with the below error.

DEBUG module.topology.data.openstack_networking_network_v2.external_network: Refreshing state... 
ERROR                                              
ERROR Error: Error in function call                
ERROR                                              
ERROR   on ../../../tmp/openshift-install-919345938/topology/private-network.tf line 37, in resource "openstack_networking_subnet_v2" "nodes": 
ERROR   37:     end   = cidrhost(local.nodes_cidr_block, 16000) 
ERROR     |----------------                        
ERROR     | local.nodes_cidr_block is "102.0.0.0/24" 
ERROR                                              
ERROR Call to function "cidrhost" failed: prefix of 24 does not accommodate a host 
ERROR numbered 16000.                              
ERROR                                              
ERROR Failed to read tfstate: open /tmp/openshift-install-919345938/terraform.tfstate: no such file or directory 
FATAL failed to fetch Cluster: failed to generate asset "Cluster": failed to create cluster: failed to apply Terraform: failed to complete the change