This list will be updated should more issues be found:

-Malformed JSON in the settings_classic.json file will result in an error and crash upon starting the game. This is due to the game trying to create a list from what it essentially views as nothing. This is only able to be triggered by manual editing of the settings_classic.json file. Deleting the file / manually correcting the code should allow the game to launch again. In the future a check will be put in place to abort the whole procedure should the file be unreadable.