https://bugs.winehq.org/show_bug.cgi?id=55824
--- Comment #3 from Olivier F. R. Dierick o.dierick@piezo-forte.be --- Hello,
I just tested and it works for me, but the launcher is not 15.7.0, it was 15.15.0, and it updated right now to 15.16.0 and I could still input the email after the update (I'm using Wine 8.15).
I remember that I had trouble typing the email validation code a few launcher version ago (the keypad number weren't working, I had to use the main keyboard numbers), but it was an application bug and it was fixed with an update.
You may be using an outdated application version. If you wait long enough on the login windows, the launcher should offer to update to the latest EGS launcher. The cog in the bottom left will show a colored dot when the update is available. Click on it and there should be an option to install the new version. Hopefully it'll work after the update.
Regards.