Problems installing blinkt! on my Raspberry Pi 4

I’ve installed Ubuntu Mate 64 bit version on my new Raspberry Pi 4 8GB.
When doing the “curl” for installing the blinkt! package, the terminal returns:

This hardware is not supported, sorry!
Config files have been left untouched

Is it not possible to install blinkt! on Raspberrry Pi 4?

I think you will find it’s an OS issue, the installer is written for PiOS. I have run mine on my Pi400 and Pi 4B.