java.lang.Exception: Could not find inject method in exploit class

[kropesiusiak]

C:\Users\majak\Downloads>java -jar OpenBukloit-1.0.8.jar -e C:\Users\majak\OneDrive\Pulpit\Vault\src\main\java\com\vault\vault\Vault.java
Compiling "C:\Users\majak\OneDrive\Pulpit\Vault\src\main\java\com\vault\vault\Vault.java"
External exploit class compiled and loaded: "com.vault.vault.Vault" (class version: 52.0 / Java 8)
java.lang.Exception: Could not find inject method in exploit class any fix or explanation?

[MsMaciek123]

Would you mind sharing the exploit code? (possibly without the functions' body, only signatures)