A9K-MOD160-SE this card is not supported on 64bit systems this is typhoon based, only tomahawk and higher https://www.cisco.com/c/en/us/support/docs/routers/asr-9000-series-aggregation-services-routers/116726-qanda-product-00.html

i would start with enabling debug for tacacs on the router login via an ssh account in another window and see if the tacacs server is replyingin the debugs you should see the "Creating TACACS+ packet to send" along with the Auth req, just need to ver...

if you are referring to the .lic files, you will need more than 8 vrf's configured on that line card you can create 8 dummy vrf's and attach to subinterfaces to test, once configured it should go into operational https://www.cisco.com/c/dam/en/us/pro...