Discovered the problem and solution: During an inspection of game files, I found that inside the game folder, both the ffxivgame.ver and ffxivgame.bck files were empty. Another player informed me that theirs held a code not unlike the one on the top left launcher window. My friend provided me with the code of the previous game version, and after inputting that through notepad, I was able to get the patch up and running. This makes sense when we consider the code 404 is (likely) universal for 'Not found'; The version code was not found in this case. Somehow the codes were lost when I opened up the launcher (but hadn't logged in yet at the time) and my power went out. That likely accounts for the loss of data. If anyone ever has this problem, well this seems to be the solution. Thank you.