Probably something's wrong with the instance, which AMI you used? the default one?

The default one is not existing/accessible anymore, I replaced it with the one that was shown in the NVIDIA Deep Learning AMI markplace page https://aws.amazon.com/marketplace/pp/B076K31M1S?qid=1610377938050&sr=0-1&ref_=srh_res_product_title that is: ami-04c0416d6bd8e4b1f