Impossible to connect touchable Pro server between ipad and Mac?

There is no connection between my ipad and Mac.

I have a Mac with Mojave (10.14.6).
I have installed the server for Mac and defined the control surface for Ableton Live 11. But the scrips found are greyed. Impossible to start them… I don’t know why.
On top of that, the manual on line does not correspond to the current version of the server. The install is done automatically at first launch of the server.

When I launch Touchable Pro on Ipad (connected via an USB cable which works), nothing happens, as if the app and the server did not recognize each other…

Could anyone help me?
Jacques (Djako)

See the snapshot of the server control here, with the scripts greyed: