client error; invalid type: map, expected a string while reading from a stream

Hi, I'm learning how to use RethinkDB and I ran into a weird error.

Code:

use reql::cmd::connect::Options;
use reql::{r, Error, Session};
use futures::stream::{StreamExt};

const DB_NAME: &str = "my_custom_db";

#[tokio::main]
async fn main() -> Result<(), Error> {
    let mut cfg = Options::default();
    cfg = cfg.db(DB_NAME);
    cfg = cfg.host("localhost");
    cfg = cfg.port(28015);

    println!("Starting...");
    let db = r.connect(cfg).await?;
    println!("Connected!");

    let mut result = r.db_create(DB_NAME).run::<&Session, String>(&db);
    while let Some(x) = result.next().await {
        match x {
            Ok(y) => println!("SUCCESS: {}", y),
            Err(e) => println!("ERROR: {}", e),
        }
    }

    let mut result = r.table_create("users").run::<&Session, String>(&db);
    while let Some(x) = result.next().await {
        match x {
            Ok(y) => println!("SUCCESS: {}", y),
            Err(e) => println!("ERROR: {}", e),
        }
    }

    db.connection()?.close(()).await?;
    Ok(())
}

The output:

Starting...
Connected!
ERROR: client error; invalid type: map, expected a string
ERROR: client error; invalid type: map, expected a string

And the weird part: the database and table are being created:

Am I doing something wrong? Thanks!

rethinkdb / rethinkdb-rs

client error; invalid type: map, expected a string while reading from a stream #62