I’ve seen there were new images for the VIM3.
I tried the VIM3_Ubuntu-xfce-bionic_Linux-4.9_arm64_EMMC_V20190719 image.
I used USB_burning_tool V184.108.40.206
At 99% I get this message.
99%:[0x30405004]UBOOT/Partition rootfs/Verify partition/Error result
It works with the server images. But not with the xfce images. With the former xfce eMMC image this was the same problem.
The SD-card xfce images do work.