Sorry about this issue. We are working on a fix for it currently. In the mean time, you should be able to still open the project using AE 17.0 (the build launched in November at MAX).
yes, we've only been able to reproduce this on Mac internally as well.
We are working on a fix for a future patch.
Thanks for reporting this. We have this in our active backlog to fix in a future patch. Sorry for the issue.