I think you must reinstall Feralheart.
I had a glitch similar to this. Soon after I reinstalled FH it began to not allow me to create characters, but when I reinstalled, the problem was fixed.
If you do reinstall, save your maps, presets, screenshots, etc to your desktop, or anywhere outside of the FH folder. ^^
Also, don't worry about your characters being deleted- They're saved in a server, therefor, they will not be deleted.
Good luck!