"You are currently on a Free plan. You cannot share documents with groups. Please upgrade your account."

"You are currently on a Free plan. You cannot share documents with groups. Please upgrade your account."

After being subscribed for the past two weeks and be able to Share documents with Groups I suddenly get the above message today, telling me that I need to upgrade.

I don't understand how I'm on a "Free plan", as I've paid!! Below is copy and pasted from the Subscription area of my account. 

Current Plan :   Standard 10 GB Edition
Payment Duration : Monthly

License Details

 

No. of Licenses in Standard 10 GB Edition

5  X $2.5