Hello @braiam, we're using one issue report per unofficially supported game title, so I've gone ahead and transferred this issue report to https://github.com/ValveSoftware/Proton/issues/4001#issuecomment-2263895394.
@kisak-valve this also happens in Battlefield 1.
Compatibility Report
System Information
I confirm:
EA complains that the installation directory is a network share/path. I'm unsure if I can fake it, but I think it expects itself to be installed in the C drive (I've seen complains about this even on Windows).
Install any game with the EA application.