After googling and looking at multiple threads on this issue, I am stoping here, I'm running into the loading screen error. I have swapped back to the default font with no luck. I have double checked my file extension and it checks out. I figured this thread was as good as the others to post in since other folks posted there issues here as well.
I created another project to try to recreate the issue to make sure I did not accidentally remove another file that the game was looking for. I added the font file to the fonts folder, edited the css page, and only got the loading screen in the brand new project. I am an OS X user for what it is worth. I have deduced that there really does not seem to be an overall solution for this issue.
In another thread one of the mods guessed that maybe some software was blocking the font since it's a css file, but switching back to the default font did not work either.