Using STM32CubeMX 4.25 to configure clock for STM32F767ZI I get PLL Mux Error, "PLL Mux should have HSE as input" when I choose HSI as clock source. The external clock pins are disabled in the "Pinout" configuration. The PLL N P Q R values are all good and throw no errors but HSI radio button selection in PLL Source Mux is highlighted with a red square and displays the error message when I mouse hover over. The clock wizard cannot fix it.
Anyone know why please and how to fix this? The ioc file is attached.
Thanks, John F.