Custom board build with Zephyr cannot find Zephyr Label clk_hsi48

What version of Zephyr did that copy of that folder come from? Keep in mind that in your last post, it’s correctly seen that the ststm32 platform currently uses Zephyr 2.7.1. If you just grabbed the ronoth_lodev folder from the Zephyr main Github branch (last stable release is 3.4.0), I’d imagine that that blows up pretty badly.

If you want to make sure to work from a known-good copy, copy it from the previously working platform packages instead: /home/ron/.platformio/packages/framework-zephyr/boards/arm/ronoth_lodev