Resolved! STM32CubeIDE 1.15 Bug (switching from SysTick to TIM16)
I'm using the Nucleo-C031C6 board, and I chose this (NUCLEO-C031C6) from the board selector when starting the IDE. (STM32CubeIDE v1.15). I tried switching Timebase Source (in SYS menu) from SysTick to TIM16, then when I compiled, I got this error:../...