JSON that causes SG to not start (no error messages)

sg_config_bad.json

{
    "adminInterface": "0.0.0.0:4985",
    "verbose": true,
    "logging": {
        "log_file_path": "C:\\Development\\logs",
        "error": {"enabled": true},
        "warn": {"enabled": true},
        "info": {"enabled": true},
        "debug": {"enabled": true},
        "trace": {"enabled": true}
    },
    "databases": {
        "sg_db": {
            "server":"walrus:",
            "users": {
                "GUEST": {
                    "disabled": false, "admin_channels": ["*"]
                }
            }
        }
    }
}