I have a large number of fonts which are tagged as “unknown font selected.” I have used these fonts for years without incident, ie Zapf Dingbats. None of the Load or Install options work on these fonts (although they are available in InDesign, which is my primary use). The main dilemma, however, is the character map for these fonts is completely blank, making it impossible to access any alternate characters. Running latest MainType, 12.0.0.1339.
Problem solved. My IT guy insists I use Avast Antivirus. It is a robust program, probably too much so. It was flagging FmsConfig as a potentially dangerous program. Once I told Avast it wasn’t, the character map has returned.