You can only view your portfolio with the machine it was created on. This does not exclude you from creating another portfolio on your computer at home. You are not using the same browser on which you created your portfolio . Sometimes even upgrading to a newer version of the browser can cause the loss of a cookie. Your cookie has been deleted from your computer .
Some people delete old files to clean up their computers and create more space.
Other times individuals use their built-in programs to delete older files and accidentally delete cookies. Your computer does not accept cookies . You have changed the settings on your computer to deny cookies. Although you can set up your portfolio, the details of your portfolio will not be saved for ongoing use. In order to save your investments in your portfolio, you need to accept cookies on your computer.