Re: Cannot launch mass effect legendary edition from steam using EA app.

Just had this exact issue. Same error code when I tried to launch from Steam. I typed "origin" into Google, clicked on the first result (which should be the official EA website) and downloaded the EA app. When I launched the executable, I selected the "repair" option when prompted. After this, the EA app opened. I closed it and immediately launched MELE on Steam, and it booted right up to the main menu. I suspect that I had at some point deleted the folder that contained the EA app's constituent files, but not its shortcut. Hope this helps.