Please help! error creating extension?

Hello, I’m trying to learn how to create extensions here for Kodular, but I’m not succeeding. I tried to replicate everything I saw in this YouTuber’s playlist https://www.youtube.com/playlist?list=PL4yqDBLrt3wucpLoFuXCtDlQeiuQxb0is but I’m not able to create the extension because it always gives an error.

Here is the image of the error, and yes, I’m using Vscode as a code editor.

Please, if anyone can help!

Ig you don’t have java installed Please install jdk 8 from azul or any other as per your wish

Well, I’ve already installed Java as I saw in the video, but this error still appears, so I don’t know what to do anymore.

Do you think JDK 8 would be better? Sorry for the question, I’m a beginner in these things.

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Yes JDK 8 or 11 is used to compile extensions