Does not resolve to a ICompilationUnit

RedHat Language for Java is just not working
No linter, no code suggestions, no "popups" on hovering, anything

I'm able to get the following error:
[Error - 21:08:10] 08-Oct-2018 21:08:10 file:///home/diego/GitHub/MAKEROID/Makeroid/appinventor/components/src/com/google/appinventor/components/runtime/util/crypt/MakeroidAES256.java does not resolve to a ICompilationUnit

It happens when the extension tries to read any file
I already tried deleting the extension and installing it again

Environment

• Operating System: Debian 9
• JDK version: 10 (tried as well on 8)
• Visual Studio Code version: 1.28
• Java extension version: Latest

Steps To Reproduce

1. Just open any file

Current Result

It should be working

Expected Result

It's not working

Additional Informations

It was working time ago, but one day it stopped working, I don't know why

通过在 VS Code 中使用 RedHat Java 扩展打开报告的 MakeroidAES256.java 文件，并使用列出的 Debian 9、JDK 和 VS Code 版本，复现该故障。先从扩展对无法解析为 ICompilationUnit 的文件的处理入手；完成标准是该文件能够被解析，并且 linting、代码建议和悬停弹窗均能正常工作。