Whenever I try to use Siri, there is a long delay after speaking, and Siri eventually responds (failing to convert my question to text) with "I'm having some trouble with the connection. Please try again in a moment". I've tried disabling voice feedback, disabling and re-enabling Siri, changing Siri's voice and language, nothing works. Siri works on every other device on our network.
Early 2016 MacBook running MacOS 10.14.3.