Error connecting between MIT AI2 App Inventor Web and MIT AI2 Companion Android Phone

when I try to connect between MIT AI2 App Inventor Website (ai2.appinventor.mit.edu) and MIT AI2 Companion on Android Phone.
that can not be connected

we can see on this picture bellow

someone can help me please, what can I do to solve this problem?

How does that phone connect to the Internet?

Through a cellphone plan or through WiFi?

wifi
in same wifi

I'm stumped.

Maybe you will spot something in

me too

this app ran well before,

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