我尝试运行以下代码，但在Scala 3.0.0上遇到错误：

// saved as file Upper1.scala

class Upper1:
  def convert(strings: Seq[String]): Seq[String] =
    strings.map((s: String) => s.toUpperCase)

val up = new Upper1()
val uppers = up.convert(List("Hello", "World!"))
println(uppers)

% scala Upper1.scala

-- [E080] Syntax Error: /Users/Deb/Desktop/Temp/Upper1.scala:7:0 ------------
7 |println(uppers)
  |^^^^^^^
  |Expected a toplevel definition
1 error found
Error: Errors encountered during compilation

我是不是运行错误了？