Send command with cyrillic symbols. Undefined offset: 0

[et-nik]

When I send command with cyrillic symbols I see 'Undefined offset: 0' error. (Example say Привет).

{
    "message": "Undefined offset: 0",
    "exception": "ErrorException",
    "file": "/var/www/gameap/vendor/knik/gameap-daemon-client/src/GdaemonCommands.php",
    "line": 63,
    "trace": [
        {
            "file": "/var/www/gameap/vendor/knik/gameap-daemon-client/src/GdaemonCommands.php",
            "line": 63,
            "function": "handleError",
            "class": "Illuminate\\Foundation\\Bootstrap\\HandleExceptions",
            "type": "->"
        },
        {
            "file": "/var/www/gameap/app/Services/ServerService.php",
            "line": 204,
            "function": "exec",
            "class": "Knik\\Gameap\\GdaemonCommands",
            "type": "->"
        },
...