I'm getting the following error when trying to run api-extractor 7.0.13:

Internal Error: fetchReferencedAstSymbol() called for a source file that was not analyzed

You should be able to reproduce the error on this branch after running "rush install" and "rush build": https://github.com/natalieethell/office-ui-fabric-react/tree/apiExtractorError