Isaac Sim sim containter installation gets stuck at: Checking for Isaac Sim assets on nucleus server

I am installing Isaac Sim using the container (on Ubuntu 20.04) but the installation stops at:

Checking for Isaac Sim assets on nucleus server

I retried a couple of times but with little success. Can you please help me with this?

Hi please provide a log. You will need to install Nucleus if it is not done yet.
https://docs.omniverse.nvidia.com/app_isaacsim/app_isaacsim/setup.html#nucleus-cloud-deployment