First try making more space on your device.
Clean off 6-8 gbs of space and reboot device. It may download again and then be good. If on IOS, make sure the offload apps feature is turned off, clear your cache, clear history on safari and spotify if you use them and you may need 10 gb free or 10% of your total storage free. IOS lies about how much free space you have so clear off everything you can.
If you have more than 6 gigs of space clear your cache, uninstall, reboot, reinstall, do not play while downloading Only do this if you have an account.
Also reboot and disconnect from your internet equipment.
