Alternate Letters Don't Work

Hello, I am in at Illustrator 2023 and have installed the latest version of Font Self. There seems to be a problem displaying the font inside Illustrator’s Glyph Panel and also and most importantly changing to alternate letters doesn’t work when typing. The font is installed through the Font Panel.

Other fonts work fine displaying the alternate letter but here it is like they have vanished.

Also the small letters are not displayed at the entire font panel but can be typed.