Can you tell me the reason for the error when starting the java project?

Question

Java

I'm trying to run the project, the console displays an error which is in the screenshot. Help me fix it please.
Here is the text of the error if it is not visible in the screenshot.

error: invalid flag: 3
Usage: javac <options> <source files>
use --help for a list of possible options

Answer 1

there have already been similar questions, here you are, for example:
https://qna.habr.com/q/591036