Greetings @VinaChoudhury ,
Thank you for posting on the Instructure Community!
Instead of directly copying your course, have you considered exporting your course as a zip file to your computer? Then just create a whole new course from your dashboard, then click import existing content then select that zip file? You can also use canvas commons as well, however since you use free for teacher your course would be available to be imported by anyone else that uses free for teacher since you can only view and share public resources. I wonder if any of those would be possible solutions for you for the time being until this is resolved?
All the best!
Noah