What does this error tell?

When I try to load HA app on my iphone it does not load like it did previously. This message comes. Picture screenshot is attached

See Ipad wont connect to server. error code NSURLErrorDomain -1001

How to make this work Mate?

How to get the ip adress to access via browser, i have powered off and restarted RPI but the ip address does not show up on the fing app.