Open Sans: Adobe Fonts installation errors and Bold style not recognized in Photoshop, Illustrator, and InDesign

Hello,

I'm experiencing an issue with the Open Sans font family in Adobe Creative Cloud on Windows 11.

When I activate Open Sans through Adobe Fonts, some font styles install correctly, while others consistently fail with the error:

"Unable to install this font."

The styles that fail include:

• Light
• Light Italic
• Regular
• Italic
• Bold
• Bold Italic

At the same time, other styles such as Semibold, Extrabold, and Extrabold Italic appear to install successfully.

Because I suspected a font conflict, I performed the following tests:

• Uninstalled Open Sans from Windows.
• Confirmed that Open Sans was no longer present in C:\Windows\Fonts.
• Restarted Windows.
• Activated Open Sans again exclusively through Adobe Fonts.
• Restarted Creative Cloud and Adobe applications.

The problem persists.

In addition, I noticed another issue that seems related:

In Photoshop, Illustrator, and InDesign, Open Sans does not properly switch to the Bold style. Even when I apply Bold, the text appearance does not change as expected.

What's strange is that this behavior only occurs in Adobe applications. The font works normally in other Windows applications.

Current observations:

• Adobe Fonts is enabled.
• Creative Cloud is up to date and connected.
• Some Open Sans styles install successfully, while others fail.
• Open Sans is not installed locally outside of Adobe Fonts during testing.
• The issue occurs in Photoshop, Illustrator, and InDesign.
• The issue does not occur in non-Adobe applications.

Has anyone experienced a similar issue with Open Sans?

Is there a way to:

1. Rebuild or reset the Adobe Fonts cache?
2. Access detailed Adobe Fonts installation logs?
3. Force Adobe Fonts to reinstall the entire Open Sans family?
4. Diagnose why some styles install while others fail within the same font family?

Any help or guidance would be greatly appreciated.

Thank you.