Active Directory w/ tljh: Can log in, can upload, can't start kernels or terminals

[jdkruzr]

Here's my config file:

  type: ldapauthenticator.LDAPAuthenticator
  LDAPAuthenticator:
    server_address: 192.168.9.20
    lookup_dn: true
    lookup_dn_search_filter: ({login_attr}={login})
    lookup_dn_search_user: CN=Jupyter,OU=ServiceAccounts,OU=Reticulum,DC=RTECH,DC=RTI
    lookup_dn_search_password: hunter2
    lookup_dn_user_dn_attribute: CN
    bind_dn_template: CN={username},OU=Users,OU=Reticulum,DC=RTECH,DC=RTI
    user_search_base: DC=RTECH,DC=RTI
    user_attribute: sAMAccountName
    use_lookup_dn_username: true
    escape_userdn: false
    server_port: 389
users:
  admin:
  - jupiter
  - jtd

Kernels never actually start running, and terminals just show up blank. journalctl -xe isn't showing any errors that I can tell. Does anyone know how I can start troubleshooting this?