Hello ,
Thank you for posting in the community and sorry to hear about the troubles. I recommend you check to make sure you are using the Datamsith exporter plugin 5.1 found here: https://www.twinmotion.com/plugins
That is the plugin to use for Twinmotion 2023.1,
If you are still having issues please report a bug by submitting a ticket here:
https://twinmotionhelp.epicgames.com/s/case-community-page
Kind regards,
Vincent B.