https://github.com/Akina-Ino/Source-Code-Inspection/blob/56b0f5f298c765bf108a41a45cc744f46a5bd433/Source%20Code%20Inspection/src/br/calebe/ticketmachine/exception/SaldoInsuficienteException.java#L7-8

Falta de serialVersionUID e do método SaldoInsuficienteException