failed to start launcher: invalid argument

[JohnSaitama]

i'm running on win 8.1... and i have a friend who CAN play on win 8.1 btw... plssss help mee

[HannesC]

Upgrade to win10. All the people with that error were on outdated OS's

[Mr. Android]

HannesC Windows 8.1 should work.

OP - please provide a screenshot and ensure plutonium.exe and %localappdata%/plutonium are added as exceptions to your antivirus.

[HannesC]

Ahh .