WAV files no loger readable

Running the previous version of Audacity on 12/11/19, and now today 12/12/19 with updated Audacity 2.3.3 with Windows 10, we have found that new and preciously exported wav files are no longer importable by the Voicient app that we have been using to send the Audacity recorded messages out by the Voicient phone tree.

Audacity’s WAV export has not changed.

What is the exact format required by the Voicient app?