I can't modified my document on Draw save yesturday reopen today

Yesterday, i create a document with Libre Office draw, i save it .odg. Today i go back to my document to make some modification.
The problem is i can’t select anything on my document, i can’t move the picture or edit the text. I’m not in read only mode, and i can add things on my document but not edit the thing who are already there.
So what i have do wrong??

Please help me fix my problem