iCloud, on iPad Air 2, continually "Upgrading"

Hi, Recently got an iPad Air 2 (using iOS 8.4).

However, it forever seems to be stuck in wanting to "Upgrade" the iCloud Drive.

Have been onto the Apple Forums but have NOT found a working answer!

They recommend "Signing-Out", of iCloud, & then re-signing back in!

However, when I do that, it won't let me use the iCloud until I Upgrade, which it then NEVER completes!

Any Ideas!

ps
This is my very 1st "Apple-Experience", so I'm not really into understanding what is going on!

If you haven't tried already you could restart it by holding home and sleep/wake button.
Restoring it with a computer https://support.apple.com/en-gb/HT201252
There's other links on that page.
If you live close to an Apple Store make an appointment and let them fix it.

Hi, many thanks for the advice!

Strangely, some time after I posted, I did yet another switch-off & re-start - this time it seems to have cleared the problem!

In reply to a post by johnjburness:

Hi, many thanks for the advice!

Strangely, some time after I posted, I did yet another switch-off & re-start - this time it seems to have cleared the problem!

Nothing strange about it, it was the first suggestion and it usually works.

In reply to a post by BatBoy:

In reply to a post by johnjburness:

Hi, many thanks for the advice!

Strangely, some time after I posted, I did yet another switch-off & re-start - this time it seems to have cleared the problem!

Nothing strange about it, it was the first suggestion and it usually works.

Yes & No!

In my case I had already tried that (as well as various other suggestions that I had found on other forums), but I simply gave it another try & it then worked!

Hence my comment was NOT about the "strangeness" of a Switch-off/on clearing the problem, but that this particular cure hadn't worked the previous times!