Ionic 2 - changes not change in live

weird issue happened to me.
first i don’t see any changes in lives, means when i change something in my app e.g text,component or something i don’t see
the changes in live change when i run ionic serve

any app i run it shows me the same weird page - never built this app, what is this page?
I open new project and when i run i see this page

dhis 2 issue happened me after i downloaded this github link

and run on my computer.
then everyapp i’m trying to run shows me this specific page