It might be more helpful if you explain the exact text of the error you are getting.
Often it is a matter of indentation, or falling out of a choice, or needing to create a variable before aetting it.
There’s a lot of helpful tutorials and topics you can lookup by searching. Someone else probably had the same error message. The search function as really helped me out a lot.
There’s also the Choicescript wiki. Maybe start with: A Basic Tutorial.
Or the commonly linked Master list for beginners.