For some reason I am unable to gain access to the HOME, DEVICE and CREDENTIALS and GROUPS tabs under the Common Services. When I click on any of those tabs, it begins to load then stops 1/2 way and sits there. I am running LMS 3.1
Try adding an entry for your TACACS+ server in C:\WINDOWS\system32\drivers\etc\hosts on the LMS server. This entry should point the TACACS+ server's IP to its hostname. Then restart Daemon Manager, and see if you can load the pages in question.