Impossible to create an item

Hi

Congratulation for Projeqtor. I'm a new user and I just installed Projeqtor for my server.
For the moment I like it but I have a problem.

It's impossible to create a item (user, contact, company...)

1) I fill the fields
2) I click on Save
>the floppy disk becomes gray
3) I change of view I have a message: "The modifications aren't saved.."
And I confirm my new item isn't created. I attached a screenshot (french sorry)


I have the problem on all item : contact, user, project....
I don't understand.

Thank you