Encoding issue when Rebuild the App Sdk from Android Studio

[neotect]

unmappable character (0xC1) for encoding UTF-8
//�¿� ��Ī�̹Ƿ�, �ﰢ���� ������ �ɰ��� ������ ���⸦ ���Ѵ�.

Please suggest if anyone have the solution.