Glad you managed to solve the problem.
On the Dedicated Server Launcher top post there’s a list of things that can cause issues:
If despite everything you still cannot get through, make sure that you do not have a firewall somewhere configured to block everything.
Generally when I try to track this type of problem:
- I make sure that my machine is fully updated
- Than no other software than what I need is running
- I disable the firewall
- I tweak the network issues until it works
- If it works, I enable the fire...