Could it be a black fill illustration file and you have a composition with a black background?
Drop a non-black solid underneath it to test.
You can also change the comp's background color in the comp settings. That way, you can see the AI stuff if it happens to be black and you can still maintain transparency if you want it.
Are you still facing this problem? If not, let us know how you solved it. If so, please let us know so we can assist you further.
1 person found this helpful
I'm not sure if this will help you out but in Illustrator you need to release the paths to layers in order for AE to read them as individual layers. Also, when importing .ai files in AE you need to select "Import as composition". There is another feature inside AE which you might find useful when working with .ai files called "create shapes from vector layers". Here's how to do it: