Right-clicking the game in Steam and selecting Verify integrity of game files to repair missing data.
While files like v4-generic-2-rar are community-sourced, if you are just looking to get a broken game running again, the "official" story usually involves simpler steps: hoiiv-fix-repair-steam-v4-generic-2-rar
Ensuring graphics drivers are current to prevent the game from failing to launch even when it shows as "running" in Task Manager. Are you having trouble installing this specific file, or How To Fix A Broken HOI4 (Hearts Of Iron 4) Right-clicking the game in Steam and selecting Verify
“It's actually not that much work but yeah it could be patched in the future... Best just wait for offline mode in this game's next patch.” Reddit · r/CrackWatch · 3 years ago The Troubleshooting Saga Best just wait for offline mode in this game's next patch
Many players resort to these fixes because the official Paradox launcher becomes laggy or fails to show mods. Some users even find that removing the launcher entirely and launching the game directly is the only way to play.