We’ve had a few help tickets with this issue.
Please download and unzip the attached qtexttospeech_winrt.zip file:
qtexttospeech_winrt.zip (26.0 KB)
Then, with Scrivener closed on your PC, please move the qtexttospeech_winrt.dll file into the “texttospeech” folder in the Scrivener installation folder.
On most PC’s, the default installation location for Scrivener is at C:\Program Files\Scrivener3\texttospeech\.
You can drop this file into that folder while Scrivener is closed and on relaunch, the voice should be present again in the speech settings. Re-select the desired voice settings, and then speech should work fine.