CC 2018 keeps crashing and cannot open the project in CC2017

Hi all,
I´m in big trouble. My CC2018 keeps crashing with the error:

Last log message was: <140735704163200> <BEE_WorkQueue> <5> BEE_Project::TimestampGetNext ZANZIBAR-3: cannot produce timestamp, frozen=0, open=0

I have installed CC2017 now, but I cannot open the project that was created in CC2018. I have a deadline though.
Any help would be greatly appreciated!