question: ExpressVPN iOS app shows “Your internet traffic is exposed”
answer: 
  If you see a message that says “Your internet traffic is exposed” on the ExpressVPN iOS app, the VPN has unexpectedly disconnected. One common cause is another VPN app or VPN profile trying to connect.
  
  Two VPN services of the same type cannot be used simultaneously on iOS devices. If you prioritize the other VPN app or VPN profile over the ExpressVPN app, the ExpressVPN app will disconnect.
  
  To resolve the issue:
  
  Remove the other VPN apps.
  Remove the other VPN profiles:
  On your device, tap Settings > VPN.
  Tap  next to the name of your other VPN profiles.
  Tap Delete VPN.