Hello,
Thank you for your help,
I've tried again this morning at it worked. I don't know what might have been the problem, because I had also tried last night before closing the program. For other users that might have the same problem, something that I did yesterday, that might have been useful was enabling all my add-on licenses. In particular Publisher might have been the one I had to enable. I did try uploading the file after enabling these licenses and it didn't work, but it did this morning, maybe some time was needed.
Thank you very much for your help.