AI Denoise fails instantly on all RAW files. "Applying Denoise" popup appears showing "10%, 9 seconds remaining," then closes without processing, and Denoise stays disabled. Persists after full clean reinstall.

Environment: MacBook Pro 13" (M1, 2020), 16GB RAM, macOS 15.6.1. Lightroom Desktop v9.3.2.

Problem: Clicking Denoise on any RAW (.CR3) opens the "Applying Denoise" popup, which displays a frozen "10%, ~9 seconds remaining" and then closes within a second or two without producing a denoised DNG. The Denoise checkbox never stays ticked and the Amount slider stays greyed out. Behavior is 100% reproducible and identical on every RAW file, including freshly imported untouched ones.

Key diagnostics already done:

• GPU is enabled for Display, Image Processing, and Export in Performance settings; tried toggling all combinations and restarting.
• Tested with a clean reboot and only Lightroom open.
• Deleted the Camera Raw ModelZoo folder - this changed behavior from "checkbox does nothing" to "popup launches then fails at ~10%," but did not fix it.
• Performed a complete wipe of all Adobe software including the Creative Cloud Cleaner Tool and Creative Cloud desktop app, then reinstalled from scratch - no change.
• Installed Lightroom v9.3.1 and still had the exact same behavior.

Impact: Denoise is completely unusable. Requesting either a fix or confirmation of which prior version restores functionality.