Revit can not sync

[marc.khalil]

Hello,

I'm trying since yesterday to sync my project but I keep getting this error message and failed to sync:

Anyone has any idea how to fix it?

[ChitnisPrateek]

Please follow the instructions in the link below:

https://www.autodesk.com/support/technical/article/caas/sfdcarticles/sfdcarticles/Can-t-edit-the-ele...

If this works, please accept this as a solution. Thank you! 

[Yien_Chao]

try  to close every worksets. then sync.