Instructions
Re-start the game to resolve any short-term issues. Occasionally, a character may become glitched or something in the environment will begin behaving erratically. If this occurs, restarting the game can often fix any problems like this, unless the problem is embedded within the game itself.
Download the latest version of the game. "Digimon RPG" has several versions, each of which limits the amount of glitches and problems known within the game. If you're running an outdated version, you may come across a problem that only the developer can fix in patched version of the game.
Completely reinstall the game. If you cannot run the game at all, there is a good chance that your files have become corrupted or were not downloaded properly. This can happen because of a multitude of reasons, but uninstalling the game and downloaded a fresh batch of files will often remedy this problem.