Launch JupyterLab by default via DockerSpawner

Hi, I am trying to run The Littlest JupyterHub (TLJH) with each user getting their own docker container to work into via the DockerSpawner. The process to set things up worked fine but the users are being directed to the old /tree view even though the DockerSpawner config has the /lab set as the default URL to launch the JupyterLab by default for each user.

Here is the DockerSpawner config:

from jupyter_client.localinterfaces import public_ips
c.JupyterHub.spawner_class = 'dockerspawner.DockerSpawner'
c.JupyterHub.hub_ip = public_ips()[0]
c.DockerSpawner.name_template = "{username}"
c.DockerSpawner.volumes = {<VOLUMNES>}
c.DockerSpawner.default_url = '/lab'
c.DockerSpawner.image = '<SPAWNER-IMAGE>'

This is what the config file for tljh looks like

  - admin
  allowed: []
  type: oauthenticator.awscognito.AWSCognitoAuthenticator

If there is any other information required to help solve this issue, feel free to request :slightly_smiling_face:.