Issue thrown when importing FamixTypeScript model: "Import error: Message not understood: FamixTypeScriptClause>> #do:"

[alesshosry]

I am trying to generate famix model using the importer, and sometimes I'm getting this issue when I import the model:

I am running it over https://github.com/microsoft/TypeScriptSamples projects. Sometimes the model is generated when the repo is not very complex, sometimes like the case of 'react-flux-babel-karma', the issue is thrown.
The same error is thrown with other projects using Angular.

I am trying this on macOS, Moose 12 and the latest versions of FamixTypeScript and FamixTypeScriptImporter.