Sign Makes get you an error and kicks you with error [Only on server]

What I expected to happen was...: Put a sign a write on it.

What actually happened was...: Kicks me from the server and gives me an error =doc.google Json File corrupted String 1 Column 2 etc etc

Steps to Reproduce:
1. Put a sign, Get away from chunk of server, Get back
2. Everytime you get in that chunk will kick you from the server showing the error
3. This is what happens if I get on the singleplayer in the sign space (See Attachment 1 )

Please Fix!