Siri answers: "There is a connection error, please try again later".
Siri isn't working correctly on my Late 2016 MacBook Pro 13" with TouchBar. When I start Siri, I can hear the beep and see the amplitude but there is no answer. After a few seconds it will respond: "There is a connection error, please try again later". I already checked my internet and Wifi connection, it works fine. The microphone isn't responsible either, as it is working, too. The only thing that helps is restart or just logging off the user account and logging back in. The problem occured in Mac OS Sierra/High Sierra and still occurs in Mac OS Mojave (10.14.4). I can't find anything on this issue somewhere else so I really hope someone can help.
MacBook Pro 13", macOS 10.14