If you've tried upload your Revit file to Modelo and it failed during the uploading process. It's most likely because your network has some fire fall setup that prevent the exporter from uploading.
To solve this issue, simply download this "debug" version plugin of ours: https://www.dropbox.com/s/
With this plugin installed, the next time you upload your model, you will see a "Save to local" option. Check that, and save the converted file down to your computer, then drag and drop that file to Modelo to upload.
Feel free to contact us if you have more questions.