You need to have rust in your system. You can use RustUp for that.
cargo build --release
sudo ./target/release/huion-drivers-wayland-rs
Seems that the tablet already works out of the box with Ubuntu 19.10
Technically this driver should work for many Huion tablets and other brands as they all resell Digipen tablets. The values for Huion GT 191 v2 are hard-coded, let me know if you want to add support for any other tablet and I can extract the configurations to a file.
Pull requests are welcome.