Im currently on Linux and when i try to open the file (EpicGamesLauncherInstaller-2.5.2-2717637.msi) it doesn't open, it gives me an error, what do i do?

Development Platform & Builds
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.msi files are Windows installers… Linux has to be gotten from github and compiled: see here

Edit to add: The Editor is all that’s working on Linux right now following the link I posted. The Launcher is not currently available for Linux.