^ When I launch the game it gives me this error, I know what it means and where it comes from but I have no idea how to fix it.

^ This is from the crash log saying the error comes from the spawner file.

^ This is the spawner file, I was trying to make spawn vanilla cats anywhere like other mobs like sheeps etc would, what's wrong with it? I never used the spawner before.

You have a , too much after the dimension line

You have a , too much after the dimension line

what does that mean? It's either that I'm dumb, I know nothing about coding, or both-

Remove the comma after overworld