Exactly like the first comment said...

This new update has a bug that requires downloading content but then says failed to download. Cannot play at all whether you try objective-based or unlimited run.Also, all weapons that were fully upgraded need to be further upgraded to survive. Still a great game. But fix this bug please. I play on the 5S.

MacNastee about Lara Croft: Relic Run, v1.10.0