Just stumbled upon this:
#define TIMER_PRESCALER_PRESCALER_Msk (0xFUL << TIMER_PRESCALER_PRESCALER_Pos) /*!< Bit mask of PRESCALER field. */
Should be
#define TIMER_PRESCALER_PRESCALER_Msk (0x7FFUL << TIMER_PRESCALER_PRESCALER_Pos) /*!< Bit mask of PRESCALER field. */
What say thee?