Forza Horizon 5 won't launch due to installation path too long

[eiglow]

Game information

Forza Horizon 5 via Proton Experimental

Distribution name and version where applicable

Fedora 43 KDE

Flatpak info

Flatpak 1.16.2

$ flatpak --gl-drivers
default
host

Problem description

When attempting to launch the game, it fails with the following message:

I know one workaround is to move the game files to a different directory, as described on protondb here. I'm wondering if there is a better/easier workaround though?

Does this issue reproduce with native Steam

No, it was working on native steam before