Can only start local clusters and not with SLURM about dask-labextension HOT 6 OPEN

dask                   2.4.0
dask-jobqueue          0.6.3
dask-labextension      1.0.3                       /home/ubuntu/dask-labextension
distributed            2.4.0

labextension:
  factory:
    module: 'dask_jobqueue'
    class: 'SLURMCluster'
    args: []
    kwargs: {}
  default:
    workers: null
    adapt: null
      # minimum: 0
      # maximum: 10
  initial: []

slurm:
    name: dask-worker

    # Dask worker options
    cores: 2                 # Total number of cores per job
    memory: 2                # Total amount of memory per job
    processes: 1                # Number of Python processes per job

    interface: null             # Network interface to use like eth0 or ib0
    death-timeout: 60           # Number of seconds to wait if a worker can not find a scheduler
    local-directory: null       # Location of fast local storage like /scratch or $TMPDIR

config dir: /opt/conda/etc/jupyter
    jupyter_server_proxy  enabled
    - Validating...
      jupyter_server_proxy  OK
    jupyterlab  enabled
    - Validating...
      jupyterlab 1.1.3 OK
    dask_labextension  enabled
    - Validating...
      dask_labextension 1.0.3 OK