Photoshop Elements 2026 v26.3 Contact Sheet II crashes immediately on macOS Tahoe 26.5.2 (M5)

System

Photoshop Elements 2026 v26.3

macOS Tahoe 26.5.2

Apple Silicon M5

Problem

Selecting File → Automation Tools → Contact Sheet II immediately produces:

• Could not complete the Contact Sheet II command because of a program error.
• The operation could not be completed. An unknown operating system error has occurred.

The Contact Sheet II dialog never appears.

Expected

Contact Sheet II dialog opens normally.

Actual

Immediate program error before any images can be selected.

Troubleshooting already completed

• Reinstalled Photoshop Elements 26.3
• Deleted preferences
• Rebuilt plug-in cache
• Verified other Automation Tools (Picture Package opens normally)
• Issue persists after reinstall.