Compile Error Message

Why are my space mod blocks not compiling right?

I'm making a fabric 1.16.5 java edition mod.

I have a Moon dimension, Moon biome, Moon Rock, and Moon Dust. How do I upload the project to this post?

First I made Moon Rock. It didn't compile right. I thought maybe I had to make somewhere for it to spawn. I made dimension, then biome to add to dimension, then Moon Dust to be the top block of biome but dust didn't compile right either. help

I'm young and very new at this, so if this is not enough information or I'm asking it wrong, please tell me.