TCC (x64) Version 28.00 Build 11 [28.00.11]
Microsoft Windows 10 Pro (21H1) [10.0.19043.1110]
I can reproduce this, I'm seeing the exact same thing as the OP.
To answer Rex's questions:
1. The dialog box closes after clicking on Open (or double clicking the filename).
2. The VIEW window doesn't open at all, it's not in the background.
3. The VIEW icon doesn't appear on the taskbar. Also, View doesn't appear in Task Manager.
If I type View Filename at the prompt, it works.
If I just type View at the prompt, the file selection dialog opens and it all works OK.
It's only when selecting View from the TCMD Tools menu that it fails, the selection dialog opens but View doesn't appear after selecting a file.
I've tried renaming my TCSTART and TCMD.INI files, it doesn't fix the issue.