When launching Minecraft through Eclipse, it gives an error, what should I do?

Question

Java

Such a thing
I decided to make a mod for Mine. Version 1.12, TL Legacy launcher. I did everything according to this tutorial: https://codakid.com/guide-to-minecraft-modding-wit... . After clicking on the Run button in Step 5, it says that it has found an error. When I click on Proceed, I get an error already in the console.
What should I do? Is it related to the pirate?

Answer 1

Is it fate to lay out a full screen?
Most likely, the project was either not assembled at all, or was not fully assembled due to an error