I very recently installed the game on a new system originally with mods. The game was stuck in a loading state with no progress number and a tiny portion of progress, regardless of time it never changed. I then tried a multitude of fixes with having all my mods uninstalled and not present such as:
-Reinstalling several times
-Verifying file integrity
-Excluding both the Stellaris /Document and /SteamApps from my firewall
-Allowing the game to pass through without the firewall
-Downloading vc_redist, C++ Redistributables and DirectX Redist
-Wiping both the Stellaris /Document and /SteamApps folder from my computer
-Deleting/Unsubbing from all traces of mods
-Changing settings such as running in all forms of screen types
Additionally all my drivers, and hardware should be up to date from what I've checked. No matter the changes it's the same problem over and over again.
-Reinstalling several times
-Verifying file integrity
-Excluding both the Stellaris /Document and /SteamApps from my firewall
-Allowing the game to pass through without the firewall
-Downloading vc_redist, C++ Redistributables and DirectX Redist
-Wiping both the Stellaris /Document and /SteamApps folder from my computer
-Deleting/Unsubbing from all traces of mods
-Changing settings such as running in all forms of screen types
Additionally all my drivers, and hardware should be up to date from what I've checked. No matter the changes it's the same problem over and over again.