Arduino for STM32

Hi
I installed following this guide https://github.com/stm32duino/wiki/wiki/Getting-Started .
When I want to transfer a sketch, the message appears:
NODE_G431KB,NOD_G431KB,NOD_G431KB not found.
Please ensure the device is correctly connected and mounted.
The STM32CubeProgrammer does connect to the device.
When I remove the CN4 pin4/5 jumper, the LED doesn't blink.
I installed the newest firmware (STLINK-V3E).
Does anyone have advice and/or his settings?
My OS:
Linux Mint 20.3 mate 64bit

If your board is a Nucleo then you should see a mass storage mounted when the board is connected.
If the board is not a Nucleo then you have to use generic variant and use an STLink.