Getting Stuck On "downloading servermanagment"

FiveM Server Development Server Discussion
2

Try this:

  1. delete server cache (only if you really have to)
  2. restart server again (without deleting cache)
  3. try to join, if it doesn’t work go back to step 2.

This usually works for me if one or more resources can’t be loaded when joining the server.

edit: Also read here: Stuck at "Downloaded sessionmanager"