Halo Gametype Editor Bugs and Errors

Halo Reach and Halo 4 Gametype Editor Bugs:

1.Having developer error.
This happens if you edit the main options on gametypes like Icon or publisher.
More details:
If you edit the following.
Gametype name.
Mod the icon,strings and other options.

Photos of the error

Even if you make a normal gametype like Slayer,CTF and Head hunter it still fails when you edit any of the options.