A Unity ID allows you to buy and/or subscribe to Unity products and services, shop in the Asset Store and participate
in the Unity community.
Is it because my version is 2020.3 and not 2020.2? But that should have no effect on Unity Hub.
Firstly there is no download project button on my Unity Hub after I installed 2020.3.2f1 LTS on Ubuntu 20.04 as shown here:...