Your save says that there are 50 scientists in transit arriving in 14 hours at X-Com N.A.
In your save, do a search for "transfers:" and you will find the entry.
A few lines above it, it also says "scientists: 0", which is the number of scientists currently at the base. If you want to, you could delete
transfers:
- hours: 14
scientists: 50
and a few lines above where it says "scientists: 0", just write "scientists: 50". When you load the game, you should have 50 scientists ready to work in your base.
Why they would be stuck in transit forever though, I don't know.. Maybe something was broken in 1.0... The nightly is much better btw