That's a font error, but without even a shred of useful info, nobody can tell you anything. You know, system info, AE version, project info and all that stuff...
i'm using Adobe After Effects CC, the latest update as of this post. Running on Windows 10
I get that error followed by this one "
After Effects error: error reading text layer.
( 76 :: 66 )"
About 5 times in a row, then the file project file never actually loads.
It's a template file i downloaded from VideoHive.
It feels like a missing font or corrupt font or something, but i've never had this problem before opening up any other projects. I contacted the author and he says he's never run into this before as well.