Spoken Content freezes on Load Voices

Big Sur 11.3 Beta 3 - Choosing any app that sources speech.speechsynthesisd freezes and prevents load. Safari, Chrome Canary, Preferences>Acessibility>Spoken Content stops and churns on Load Voices. Beta 2 works fine.

Unable to directly modify even when booted from external drive in 11.3 Beta 2.

Report continues to appear until a reboot. Suggestions? Have approved more than 30 reports through sysdiagnose. Assistance? Have boot from 11.3 Beta 2 and turned off updates.
See that there have been no comments or replies here with regard to Beta 3 issues. For the record, Beta 4 was posted shortly after 3. There is, however, a greater issue: Menus are blank, Time and Date do not appear, and Control Center appears to be broken.

The actual URL for my Forum thread:
https://developer.apple.com/forums/thread/676478?login=true&page=1#667515022

However, if you save the tab and return to that tab, you may see:

We'll be back

and the URL will have been modified:
https://developer.apple.com/forums/thread/676478?login=true&page=1&r_s_legacy=true#667515022

Spoken Content freezes on Load Voices
 
 
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