I just bought Scrivener and started my 1st project.
After couple of seconds, the automatic tried to save, a pop-up appeared : “Error : could not open RTF file for writting”.
Thank you for your help
Start by whitelisting Scrivener in your Antivirus program. There have been dozens of posts on this.

Mark
Well, you were right, it was not easy but it was successful. Thanks,