Just got Apple TV device and loaded apps but 7 plus won’t open. What else can I do?

Is 7 plus an app or do you mean more than 7 apps.

Try the following steps for the Apple TV HD/4k, check whether things are working after each step where appropriate, before trying the next.

1. Check that there isn’t an update for the App, navigate to the App Store ➔ Purchased, scroll down and select the app and then navigate to and select the update option (if appropriate). You may wish to have your apps update automatically (Settings ➔ Apps ➔ Update Automatically ➔ On).
2. Try restarting the Apple TV (Settings ➔ System ➔ Restart)
3. Try restarting the network router.
4. Press the TV button on the remote twice to activate the app launcher, scroll left/right to locate and select the app that you are having a problem with and swipe up to close (quit) it. Relaunch the app from the menu screen to check if it is now working.
5. Try deleting it and reinstalling the problematic app. There are 2 methods of deleting an app.

• Select the app on the main screen and press and hold the touchpad until the app icon wobbles. Press the play/pause button and choose delete from the menu that appears.
• Navigate to Settings ➔ General ➔ Usage ➔ Manage Storage, scroll and select the trash can to the right of the problematic app and choose delete from the menu that appears.

I think its happening to all apple devices, not sure if its affecting apple tv. But half of the applications are just crashing on iphone and ipad for an hour now around the world. Can only open apps if disconnected from internet.

I find that somewhat doubtful.

If you need to see the service status, you can always look it up.

iCloud System Status  (US)  iCloud System Status (UK) 

If you are in a different location use the UK link, select the location flag in the bottom right corner of the screen, choose your country from those available and then click on the URL of the next page that loads to discover your country code (i.e https://www.apple.com/au/, Australia=au). Once you have your code go back to the UK system status page and substitute uk in the URL with your own country code.