IOS – App Store links don’t work when App Store is running

1. Go to Settings -> iTunes & App Store -> AppleID -> Sign out.

2. Close the App Store app (double-click home button, swipe up on App Store), and restart the phone -- but instead of holding the power button and shutting down "cleanly", hold the power and home buttons until it powers off. Power it back on.

3. Settings -> iTunes & App Store -> Sign In. See if you get the same results.

If that doesn't do it, try deleting the affected apps, then shutting the phone off cleanly, then starting it back up and re-installing the apps.

• As 'Dempa' said in comments, you should do a hard-reset: https://support.apple.com/en-us/HT201559 <- "Force Restart"

• If this does not solve the problem, you should back up your info in iTunes (Assuming that you cant open Settings app): https://support.apple.com/en-us/HT203977 <- "iTunes Backup"

• And if restoring doesnt solve the problem, you will have to go into an Apple Service Shop/Center, however they are called in your country, and ask for technical assistance.

**Im pretty sure the HARD RESET step is what you need.

Hope it helps.