[2020] Is this a Steam problem/error or a game problem/error?

The steps in this post fixes most problems with the launcher: https://steamcommunity.com/app/255710/discussions/0/1742265315844206043/

If that doesn't solve things for you, then you can contact support here, so they can log the bug for fixing: https://forum.paradoxplaza.com/forum/index.php?forums/support-bug-reports.879/