After submitting credentials during MAC Registration the web page hangs stating Network Registration in Progress. I don't know which policy need to change to address this. This is for Wired NAC.
If the client is able to get to the portal to enter the credentials we'd assume that the non-authenticated policy is OK so that would indicate that the authenticated policy is missing something.
Is the client switching VLAN/subnet during the authentication (=put in another VLAN if authenticated) or is the VLAN/subnet the same in unauthenticated/authenticated state.