Hello ,
Thank you for posting in the community and sorry to hear about the troubles.
Could you confirm you are using the Datasmith Exporter plugin 5.0.3v2 found here:
https://www.twinmotion.com/plugins/revit
You can check the Datasmith version by referencing this article:
https://twinmotionhelp.epicgames.com/s/article/How-to-find-the-Datasmith-Exporter-Plugin-Version
When using the Direct Link process it stores the files in a cache folder specified in the connections settings. Changing the path could potentially help and making sure the permissions to that folder are correct.
Also make sure there are no blocked ports or your firewall is not blocking the applications.
Are you on a wifi or wired network and does it make a difference, is one a public or private network?
You can reference this article on how to check any blocked ports:
https://helpdeskgeek.com/networking/determine-open-and-blocked-ports/
Process Monitor application can be used to find out what port Revit and Twinmotion are using:
https://learn.microsoft.com/en-us/sysinternals/downloads/procmon
If the problem persists please contact us directly so we can further investigate.
https://twinmotionhelp.epicgames.com/s/case-community-page
Kind regards,
Vincent B.