Hi everyone, just to highlight that the very latest versions of Carto seem to have changed the export file structure somewhat. Thank you to @noelfitzpatrick for highlighting and debugging this. There is a new feature branch feature/newfilestructure available here which should fix this.
We will be doing more testing and eventually this code will get merged into the develop and master branches. For now we will keep it separate though until we are sure that it is working reliably for the new file format and also maintaining compatibility with older systems.