[Fix] “Process returned unknown error code” – Dreadnought

Process returned unknown error code occurs in Dreadnought when “OPENSSL_ia32cap” variable is missing.

Fix 1: Restore “OPENSSL_ia32cap” variable

  • Go to your file explorer.
  • Find “This PC” and right-click on it.
  • Click Properties.
  • Now go to Advanced System Settings > Environment Variables > System Variables.
  • Create a new variable and rename it to “OPENSSL_ia32cap“.
  • Set its value to “~0x200000200000000“.
  • Save it.
  • Launch Dreadnought.

It will fix “Process returned unknown error code”.

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