Opening xdesign file

Hello
I have been testing solidworks cloud for several days with a student license.
So I draw under xdesign.

I have to do it several times so that my previously created file wants to open but it works less and less. Since most of the time the dialog window says " step 2/3 connection " and nothing happens.
I also get a message on the right every time that tells me that the collaboration space is not available.

I don't know what to do to make this interface useful because for the moment I can't use it anymore.

Thank you