Although I have never seen this error, I thought I’d share it and how to resolve it.

Error: “You do not currently have access to Autodesk Collaboration for Revit” appears when trying to open a cloud workshared model from Revit

In this link below you will see how to resolve these errors by either giving user access, resolving network or service access.

https://knowledge.autodesk.com/support/bim-360/troubleshooting/caas/sfdcarticles/sfdcarticles/Collaboration-for-Revit-Error-You-cannot-use-the-option-Collaborate-Using-A360.html