when Decode.fromBytes myJson Json.fromUtf8 is
    Ok { message: { content } } -> process content
    _ -> process "uh oh no content"

── UNFINISHED WHEN ────────────────────────────────────────────────── main.roc ─

I was partway through parsing a when expression, but I got stuck here:

31│          Ok { message: { content } } ->
               ^

I was expecting to see a pattern next

Note: Here is an example of a valid when expression for reference.

    when List.first plants is
      Ok n ->
        n

      Err _ ->
        200

Notice the indentation. All patterns are aligned, and each branch is
indented a bit more than the corresponding pattern. That is important!