NFS Heat PS4 - addon does not install

Hello everyone.

I have just started playing NFS Heat and have purchased the addon "McLaren F1 Black" in the Playstation Store.

The car doesn't show up in the "swap car" menu and when I look it up under the addon purchases, it says "installed" but further into the sub menu, it says "not installed yet". Nothing happens - it doesn't get installed and I am getting no notifications on why it doesn't install.

What should I do?