Sadly I did not found a workaround. I see that you are using Crosstales wrapper for choosing a files, but maybe there's a Unity native one ? It might support Wayland.
Viewing post in Crashes on Wayland
That's too bad! I'll look into this myself too, see if the Crosstales wrapper can or needs to be updated on my end. Unfortunately Unity does not provide a native one, I've been asking for such features for years but to no avail.
Again though, since this is obviously a technically issue I can give a refund if you wish.