Moving this discussion to the After Effects forum.
Did you try the troubleshooting steps in the document linked to?
There is no such thing as a "standard font error". Sorry, that's a dangerous generalization and oversimplification. I literalyl have dozens of font errors in my database and they all come with different causes and numbers, meaning they appear in different contexts/ parts of the program/ with different functions used. Since you did not provide any more info about your system or what version of AE you use, we can't even begin to guess. and just because otehr programs show certain fonts doesn't mean they necessarily show up elsewhere. You could have the same problems in otehr tools just as well, so I'm afraid "find something else" without even trying to resolve the issue is not really a productive way to go about the matter and not doing the whole thing justice. A single "bad" font can make or break a system and things like font managers, printer drivers and even your bog standard graphics driver al lhave to do with accessing and rendering fonts and could influence application programs....