Hello
There are two types of web client for managing the vSphere environment:
https://vcenter/vsphere-client will refer you to the FLEX (flash-based) and is the older version, and
https://vcenter/ui is HTML5-based and is the new one.
As daphnissov mentioned try the 2nd option and login with this type of vSphere web client.
Also you set vsphere.local as the username and you should be aware it's incorrect because vsphere.local is the SSO domain name, you should set like: administrator@vsphere.local and its password (you set it in the deployment wizard) as your login credential