Can´open my project / duplicate it, after saving

Hi after i m saving my project i can’t open it, i can’t duplicate the project too.
If i open it there is nothing inside. I’m now afraid to open and save the next projects.

I use an iPad 7

Best regards

You can send the file to and I’ll take a look.
But I’m afraid the file is lost for good.
Was it a big file ?

I will send it to you.

one 160mb

one 130mb