The Pi is an ARM system, not an Intel system. It runs with the ARM 64-bit instruction set, called `aarch64`.
The VM you have is for "intel" 64-bit, aka `x64`, or `x86_64` or `amd64` and so on.
The VN is not for your processor. you need to download the ARM variant ( “Linux (ARM)” in the Screenshot ) <img width="372" alt="Bildschirmfoto 2020-12-30 um 17 57 04" src="https://user-images.githubusercontent.com/119279/103368675-79a98700-4ac8-11eb-82c4-13453ec4a22b.PNG">
Note that you probably need some libraries, too, because the VM is for the Raspberry-Pi 2 and 3 compatible ARMv6 instruction set (which is a 32-bit one) so you might need some multi-arch support in ubuntu.