Xoroshio

Hello there, you have the wrong Java version and you need to update not downgrade. I hope this helps

Did you accidentally update your minecraft forge version?

You have to create an Entity class called PlayerPart and use multiple of them to make the different parts of the player. See EnderDragonPart.java source code. The green hitboxes of the dragon are all EnderDragonParts

Yeah, so deltaMovement and jumping have to be done on the client. The reason it only happens on the client is so that the animations are smooth. Client to server communication for movement is not very smooth. You can move the player with player.setPos(x, y, z) on the server using manually managed velocity, but the player’s movement on the client will not be smooth. I hope this helps 😃

On the one off the last lines of code you have put && boots.isEmpty() Instead of && !boots.isEmpty() is that a typo?

Does anybody know how to add music to a custom dimension? In the dimension I have, I am only using vanilla biomes. Please forgive me if this is a dumb question 😊