Mute for... dialog inaccessible to screen readers

[TheQuinbox]

Describe the bug
When clicking mute for... from the menu while using a screen reader, I get a dialog with 2 unlabeled buttons, an OK button, and a Cancel button.
To Reproduce

1. Start NVDA
2. Press shift f10 on a chat
3. Select mute -> mute for...
4. Tab
   Expected behavior
   I should be able to use this dialog accessibly
   Version Info

• Unigram: 9.2 x64
• Windows: Windows 11 21H2 (X64) build 22000.1335

Additional context
Add any other context about the problem here.