Thats quite a few fonts you've got! There shouldn't be a limit to the number of fonts it'll load, but you're far outside of the range that I've tested it with. What version are you running? If you're running windows, try clicking help > debug in the menu to show the error log. Or if you're running it in the browser try right clicking > inspect > console. Then with the debug window open, try loading your fonts and let me know if an error message pops up in there.