PIO STLink Fix
PlatformIO has an older version of STLink. It is unable to communicate with the STM32L MCUs on some Rx's.
Swapping out PIO's STLink folder contents with the current STLink will allow using the configurator with these RX's.
Go to your STLink folder
- copy contents of "ST-Link Utility"
C:\Program Files (x86)\STMicroelectronics\STM32 ST-LINK Utility\ST-LINK Utility
- paste files from "st-link utility" folder into "stlink" folder in your users PIO location