I can't access to JupyterLab from other users

i cant access jupyterlab by other users from jupyterhub, and i set
c.Spawner.default_url = “/lab” but still i get this
404 : Not Found
You are requesting a page that does not exist!
but form default user its work perfect, who to solve this ?

Hi! Please can you give us enough information to reproduce your problem? For example, what operating system are you using, how did you install JupyterHub, what exactly did you install, what is your configuration, etc?

yes i have install it directly in my linux system with pip
and this is my conf :

c = get_config()
c.Authenticator.admin_users = {‘said’}
c.Authenticator.allowed_users = {‘said’}
c.Spawner.default_url = “/lab”

i can access jupyterlab with user “said” but other users its show me “404 : Not Found”