Hi,
I had the same problem.
Rebus sent me this solution, and it works now:
Please try to manually re-install the Rebus plugin for your 3D application(s):
1) Please make sure your 3D application is closed.
2) Open the RebusDrop Preferences.
3) Select the 3D software you use and click "Remove" also check and delete it manually from the folder you installed it.
4) Select Add Applications in the tab Paths.
5) Select the 3D application entry in the list.
6) Click on Re-Install Plugins.
7) Save, run your 3D application and submit a small test job.