Apologies if this is a known issue - I could not find any reference. When trying to install any of the 2019.3 alpha builds, the NVDA error sound occurs and speech is lost.

Steps to reproduce:

1. Download any NVDA 2019.3 alpha
2. With NVDA 2019.2.1 running, attempt to install the alpha

Actual behavior:

The intro music plays.
The NVDA error sound is heard and speech output is lost.

Expected behavior:

Speech continues to guide one through the installation

System configuration

NVDA installed/portable/running from source:

Installed

NVDA version:

2019.2.1 or earlier

Windows version:

OS Name Microsoft Windows 10 Home
Version 10.0.18362 Build 18362

Name and version of other software in use when reproducing the issue:

Windows Explorer

Other information about your system:

The problem occurs whether using eSpeak or Windows OneCoreVoices

Other questions

Does the issue still occur after restarting your PC?

Yes

Have you tried any other versions of NVDA? If so, please report their behaviors.

NVDA 2019.2 with the same result. The issue occurs with any of the 2019.3 alphas I have tried. I complete the installation (as a portable version) by running Narrator. The alpha version starts normally, having checked the checkbox and I then turn off Narrator.