Team drive project lost?

I created a team drive project a couple months ago. 

It's been smooth sailing and the project is in final review.

Today, during a review meeting, when I launched Premiere Pro, the project does not show up. 

I see I am logged into premiere pro, the project assets are in cretive cloud, but the activity tab shows a date stamp of October 24, 2017, and a never ending wait animation, that never seems to time out.

My only other colleague on the project says he can open the project but a bunch of assets are offline.

Does anyone know what this failure is, and how to recover from it?

the only changes to my machine were an update to OS X High Sierra from Sierrra, but I seem to recall the project has  been opened once since that update.

I really don't want to have to edit this whole timeline from scratch again.