As of this morning, all text currently on signs, both signs WITH glow ink, WITHOUT glow ink, colored with dye, and completely unaltered, disappeared. All signs within the server are blank. With this problem also came the addition of in-game chat not working.

We have broken signs and retried to build them. You can type out the text when making them, and briefly see the text when you set the sign in place, but it almost instantly disappears. 

With the game chat, the administrator with creative power can use the /say and other players can see the message, but non-admin characters can not use the /say command.

We have restored previous versions and uploaded older versions to no avail. When downloading the most current server version into single-player, all signs are blank, but if you place a new sign in single-player mode, the new sign shows text.