Fonts Keep Disappearing
I am using the same fonts all the time - quick edits to business cards etc. Font errors keep popping up when I open files I use all the time - for fonts that are available on Adobe Fonts. They will be removed from my system (even if I used them as recently as the day before) and just keep cycling in the Add Fonts panel.
Even going on the Adobe Fonts site, clicking remove, and re adding / shut down / restart - it will just keep cycling.

