I need help creating an extension

I’m too lost, I more or less know a little bit of java, but I almost always feel like I’m missing something.
I’m trying to create a small extension that contains different types of operations, but when creating the block with a certain operation and executing it, I get this error.


And the code of the block is the following

At the moment I am trying to perform a simple addition.

This is clearly says that you have deleted the the extension and uploaded the newer version, may be… If you do so, pls disconnect companion, refresh the creator page then open aia, upload the extension and try connecting with companion

Also why do you use simpleobject for the main class?

Aix file is generated only when component is external, otherwise you’ll only get a Build Success output.