Ubuntu 14.04 LTS was released to the public a few weeks ago. And, after trying out a few game panels, I decided to come back to TCAdmin on a new server to host it. Much to my sadness, the MONO library (the recommended download) from the TCAdmin documentation for Linux is incompatible with 14.04 LTS. It neesd libtiff4, but 14.04 no longer supports it.
The solution to this problem is to manually install libtiff4 from 13.10.
Download for 64bit Ubuntu Linux link: http://packages.ubuntu.com/saucy/amd64/libtiff4/download
Hope this helps anyone else out there!