From the EVE Online Discord → launcher-beta → Linux thread - here be dragons
ok, nerds, we may be in front of something bigger than just the Launcher
there is a known issue in WINE: everything in any WINEPREFIX is run by default as administrator, and (since 5.12-staging) cannot be run as regular user anymore
developers are working on a proper UAC implementation that “understands” privilege de/escalations. in the meanwhile they removed “runas.exe” from the distribution
relevant info and known issue in official bugzilla: WineHQ Bugzilla – Bug 40613 – Multiple applications require UAC implementation to run installer/app as a normal user instead of administrator (WhatsApp Desktop, Smartflix, Squirrel Installers, OneDrive)
this is an issue with anything that requires admin privs to be dropped - most notably Squirrel installer