There is a fix for the error message you’re receiving, it just takes a bit of time, and also the knowledge of how to get around the issue. Generally speaking, these issues will sometimes occur when Rockstar Games are carrying out scheduled and unscheduled server maintenance. If you’re attempting to log into GTA Online and instead receiving an error message which reads ‘Files required to play GTA Online could not be downloaded from the Rockstar Games Service’ don’t worry, it’s not the end of the world.