Steps to reproduce:

1. Update to the latest available alpha build of NVDA (alpha-52548,9996c490 (2026.1.0.52548) at the time of this writing).
2. Open NVDA's settings.
3. Navigate to the "Vision" category.
4. Activate the checkbox "Enable Highlighting".

Actual behavior:

• The following error message is displayed in a dialog: "Vision Enhancement Provider Error. Could not load the Visual Highlight vision enhancement provider".
• The "Visual Highlight" feature is not enabled.

Expected behavior:

The "Visual Highlight" feature is enabled.

NVDA logs, crash dumps and other attachments:

NVDA_Log_2025-09-12.txt

System configuration

NVDA installed/portable/running from source:

Installed.

NVDA version:

alpha-52548,9996c490 (2026.1.0.52548)

Windows version:

Windows 11 Pro version 24H2 (build 26100.6584), 64-bit, in Bulgarian with all locale settings set to "Bulgarian".

Name and version of other software in use when reproducing the issue:

Not applicable.

Other information about your system:

Not applicable.

Other questions

Does the issue still occur after restarting your computer?

Yes, it does.

Have you tried any other versions of NVDA? If so, please report their behaviors.

Yes - NVDA 2025.2 - the issue is not present there.

If NVDA add-ons are disabled, is your problem still occurring?

Yes, it is.

Does the issue still occur after you run the COM Registration Fixing Tool in NVDA's tools menu?

I haven't tried, but considering the issue does not affect older versions of NVDA, I doubt that it is related.