Screen Locked with box "Cannot Access Find My Friends"

Question

This has never happened...when I try to go on my iPad there is a box that says "cannot access find my friends" with 2 buttons "later" or "open". When I select either of those nothing happens.  I have tried shutting down and it won't let me select to power down.  I have asked Siri all sorts of questions and commands which she answers and follows.  When I ask her to go to the find my friends app it displays a white screen.  I never even use this app.  Here is a pic of what it looks like.

Answer 1

Try a device reset:
Device Reset (won't affect settings/data/music/apps/etc)
1. Press and hold (& continue to hold) BOTH the Sleep/Wake button & the Home button.
2. Continue to hold BOTH (ignoring any other messages that may show) until you see the Apple logo on the screen.
3. Release BOTH buttons when you see the Apple logo and allow the device to boot normally.
Afterwards, enter multitasking and close off the Find My Friends app as it may be running and throwing this message. It appears you are likely on iOS 6.x so I'll include the procedure to close off the app for that iOS as it's different than iOS 7 and above:
Double-tap Home, press and hold one of the running app's icons (in your case, Find My Friends) until it wiggles, press the red - on the icon to close the app. Do this for all of the apps you want closed.
Note that a similar pop-up message stating something like "This iPad had not been backed up for xxx amount of time" has also been know to appear with similar symptoms as this message. The only way to clear the message is with a device reset as mentioned above. Apple needs to address (at least) this "no backed up" message issue as it can prevent one from using their device unless they know of the reset.