I've downloaded Dilbertfont2 a couple of times and all it shows is question marks instead of letters. I've installed it correctly on my Mac (and then removed them since they don't work). Anyone else having this trouble? Any fixes?

https://www.dafont.com/forum/read/181259/18th-century-font-problems-installing-mac

I tried that with Font Book and it says "3 serious problems were found. Do not use these fonts."

Problem

I tried Type Lite https://www.cr8software.net/typex.html . I don't know what it did but if fixed the problem. I saved the font as .ttf file and it installed just fine. I don't know why since that was the type of file it was before. So, many thinks for the tip!!!