Sorry you ran into this, @Marylie. Please can you try restarting your computer?
If that does not help, you could also try the steps Nick posted in Unable to start site and Creation impossible - #2 by Nick-B.
Sorry you ran into this, @Marylie. Please can you try restarting your computer?
If that does not help, you could also try the steps Nick posted in Unable to start site and Creation impossible - #2 by Nick-B.