Paradox Launcher not found when launching Stellaris

Was trying to start up Stellaris and received the not-so-fun message in the screenshot about a valid installation of the Paradox Launcher not being found. I attached the game log from Heroic.

For context, the game is:
  • from GOG
  • native Linux version (no exe or Proton!)
  • freshly installed
In poking at the issue, I discovered that the Paradox Launcher will run correctly in different cases.
What didn't work:
  • Disabling GameMode in Heroic before starting via Heroic
  • Setting /home/chase/Games/Heroic/Stellaris/game/dowser as alternative EXE in Heroic before starting via Heroic (wasn't entirely sure that feature made any difference for non-Proton games)
    What did work:
  • Directly executing /home/chase/Games/Heroic/Stellaris/game/dowser outside Heroic
  • Directly executing /home/chase/Games/Heroic/Stellaris/start.sh outside Heroic
Hopefully that is helpful information. If there's anything else I can provide, please let me know!
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