STM32G0B1R is not listed as a board in PlatformIO Project Wizard. Check the PlatformIO site and sure enough its not listed. What it tries to use is ST STM32G0316-DISCO or ST STM32G071b Discovery. This is not what is used on the BTT_SKR_MINI_E3_V3.
When I use ST STM32G00316-DISCO it places the following in platformio.ini
[env:disco_g031j6]
platform = ststm32
board = disco_g031j6
framework = arduino
How do I fix this? Thanks in advance.