Character Animator: Can't write to font cache directory

if you're using the beta version that path will be "Character Animator (Beta)" instead of "Character Animator"

Sounds like a permissions problem with this directory: %LocalAppData%\Temp\Adobe\Character Animator\4.0\Typesupport (replace "4.0" with your current version)

Using Windows Explorer, you can delete that "Typesupport" directory if it's there already. If that doesn't work, delete the entire 4.0 (or whichever version you are using) folder, though that will reset any preferences you have changed — not usually a problem as Ch doesn’t have many preference settings.