I want to add Scala1.java to the payload, but after adding it, problems keep occurring.

I want to add Scala1.java to the payload, but after adding it, problems keep occurring.

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.8.1:compile (default-compile) on project ysoserial: Compilation failure
[ERROR] C:\Users\test\Desktop\ysoserial\ysoserial-master\src\main\java\ysoserial\payloads\Scala1.java:[13,30] 错误: 找不到符号
[ERROR] 符号: 类 StubClassConstructor
[ERROR] 位置: 程序包 ysoserial.payloads.util
[ERROR]
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException