These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.
I think that your image might be faulty, what is the exact format that you are uploading?
But anyway, I would strongly advise you not to use Ubuntu 14.04, it is EOF and there are no security patches anymore. I would recommend just building a new image based on Ubuntu 18.04.3 instead.
The developer cloud
Scale up as you grow — whether you're running one virtual machine or ten thousand.
From GPU-powered inference and Kubernetes to managed databases and storage, get everything you need to build, scale, and deploy intelligent applications.