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superpotato_____

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Aug 28, 2021
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  • Europa Universalis IV: Rights of Man
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  • Hearts of Iron IV: Expansion Pass
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  • Victoria 2: Heart of Darkness
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  • Europa Universalis IV: Res Publica
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so today i had to uninstall and reinstall steam to fix an issue and now have to reinstall all of my games obviously eu4 is one of them. it reinstalled fairly quickly and i was going to start as new campaign while the rest of my games downloaded, however when i open the launcher it display's the message: "steam runtime communication error: we had trouble communicating with steam." blah blah blah. does anyone know how to fix this. thanks in advance.
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I suspect your Steam reinstall was not a clean one.

- move any valued save games elsewhere
- "uninstall" in Steam-EU4
- exit the Steam app completely
- manually delete both the Steam/SteamApps/common/EU4 AND Documents/Paradox Interactive/EU4 folders

- delete everything in the Steam folder EXCEPT steam.exe and the SteamApps folder
- run steam.exe to rebuild all that

- re-install game in Steam, run a Steam Verify when done.
- add EU4.exe to the exceptions list of your antivirus app; ESPECIALLY if you have Windows Defender, add it to the Ransomware "Apps Allowed Through" list.
- start the game with no mods active and test


Good luck with that!