What happened:
Running the basic quickstart example with dask-kubernetes==2021.10.0, I get the following error (full trace below the fold).

RuntimeError: Cannot add child handler, the child watcher does not have a loop attached

What you expected to happen:
Start a basic cluster.

Minimal Complete Verifiable Example:

pip install dask-kubernetes==2021.10.0

from dask_kubernetes import KubeCluster
# yaml copied from quickstart
cluster = KubeCluster("worker-spec.yaml")
cluster.scale(1)

Anything else we need to know?:
It works on version 2021.3.1.

Environment:

• Dask version: 2021.10.0
• Python version: 3.7.3
• Operating System: Debian buster (running on Google Cloud Shell)
• Install method (conda, pip, source): pip