Why Font(HelveticaNeue Bold, HelveticaNeue) show * in Adobe Illustrator CC 2021 25.0.0.60 for Window

I am having the same problem I have used it alot in the past now not working can you or anyone help with tis

The * is not showing the font installed, it's showing that it's NOT installed.

How did you install, by using the built-in installer (right mouse click-> install), or by physically dragging into font folder?

If the latter how do you know it's a valid font file?

What's the suffix?

If this came from a Mac it may not be Windows compatible.

What's the file size? - if it's zero or very small it's probably corrupted or an old font format.

If it was sent by email unZipped, it may have become corrupted.

I'm curious why Illy isn't asking you if you want to Activate missing fonts...

You are opening a file you received from someone else and the font shows like that?