Why do the apps I try to download stay in install mode?

[craiggy]

I have a Galaxy S4 with plenty of space to download more apps and all of a sudden when I try to download a new app it just says installing. But it doesn't install. I have tried cancelling the download and trying to do it again but still the same outcome. It is like this will all new apps I try to download.

 

[VW Maverick]

Welcome.
Go into Settings, then Apps. Find Google Play Services and then clear the data and cache.
Reboot and see if that works.

Mav.