Hey guys, so I have a problem with the newest pack I installed it but when I go to buy a car it says it is still installing… Do I need to reinstall everything??
Thank you for your future help 
Try a cold reboot. Exit all games and hold power button on console for 5 secs. Once powered down restart. Then check in my games and apps if anything is in the queue.
If it does not work you may need to uninstall and reinstall the game…just the game. Do not touch your saved game which is another option.
I already tried the cold reboot so I guess I am going to reinstall the game. It is just annoying to not be able to delete and reinstall addons.
Edit: Nevermind I found how to manage the addons. I am going to try to reinstall the pack first
Let us know if it worked, somebody else might have the same problem!