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@benpanderson

**error**: **externally-managed-environment**
    × This environment is externally managed
    ╰─> To install Python packages system-wide, try apt install
    python3-xyz, where xyz is the package you are trying to
    install.

That error message is a result of a change made in the Bookworm OS release.
Virtual Environments, Libgpiod, gpiodevice and the current mess I’m making of our Python libraries - Support - Pimoroni Buccaneers

Which is likely why things are messed up for you. One way out is to reflash your SD card and select the “Legacy OS” option. That will get you Bullseye instead of Bookworm. And the installer “should” work OK. It’s a viable option on a Pi 4.