So, you just deployed the latest Horizon View Unified Access Gateway OVA appliance and now you are trying to access the admin web page but it is not responding. This is an easy fix but will require you to power off and delete the UAG appliance and redeploy it. The problem occurs if you entered an admin password that does not comply with the complex password policy. When you redeploy the appliance and get to the following step make sure the password you enter meets these requirement :
Deploy the appliance and power on and go to https://My_UAG_IP:9443/admin/index.html