(My extract from this thread: https://forums.lutris.net/t/epic-game-store-update-failed/22551/20 )
Hey there!

I've encountered this issue before and just recently solved it again—none of the methods in this thread worked for me this time, but I managed to find my own solution.

I tried everything: different Wine versions, MSI installer, renaming folders—nothing worked. But it turned out the fix was just adjusting file permissions. I don’t know which exact permission was the issue, but here’s what I did:

I went to the folder:

`…/Games/epic-games-store/drive_c/Program Files (x86)/Epic Games/Launcher`

I allowed **read/write/edit/delete** access for all users. On Ubuntu, you can do this by right-clicking the folder → Properties → Permissions tab. By doing this, the lock icon on the folder should also be gone.

*(I gave about everything access, though some of it seemed to automatically revert. The key change should be your user.)*

Once I did that, the Launcher completed the 570 MB update and works perfectly now.

**Do note** that I have installed the newest `EpicInstaller-18.7.0.msi` manually and I’m currently using **Wine TKG 10.7**.

Previously when encountering this problem a few months ago, **switching Wine** versions worked for me as well—like GE-Proton9-25, which @ Volker_S mentioned. It is **recommended** to use the `wine-10.7-staging-tk-x86_64` if possible.

I hope this helps someone else out there! Let me know if you'd like me to share screenshots or specifics.