Ok, I see the forum topic Confrict between “Seeed SAMD Boards” and “Seeeduino AVR”
I also get the Index error that salman gets but can now install the Seeed STM32F4 Boards package.
However, now when I attempt to run a script I get the following error:
Error compiling for board Wio Tracker LTE
exec: “/bin/arm-none-eabi-g++”: file does not exist