imovie 11 error message when open new projekt

Hi, my friends, sorry my english is no so well.

I have a Problem to open a new projekt in Imovie11. Everytime i open a projekt a message comes. I would have not enough disk space to open anew projekt or would not have the rights to write a new projekt.

Free Disk Space 150 GB, so enough Space

Rights - i have reset the rights, i have repair the rights but it doesnt take any effekt.

So do you have an idea ?

every other software works without any problems.