An outdated OS can have expired security certificates that fail Gameloft’s server validation.
It sounds like you're encountering a in Asphalt 8: Airborne when trying to update or download a "solid feature covering" (possibly a car skin, decal, or special event tile). code 500 error asphalt 8 upd
Having trouble with a "Code 500" error while updating Asphalt 8? This post walks you through quick, practical fixes to get the update working again. An outdated OS can have expired security certificates