The application does not work!

Whan launched, the application opens a pop-up window with the message “Cannot connect to server”.
There is no way to overcome this.
Furthermore, when trying to send a message to the support, one gets the same error message from the browser.
Apple Store should check such aspects before publishing any software:
I have paid and I cannot get a fix.

MMes Astronomo about Trips Pro, v1.0