Error: PORTx-Access or Config using the Universal-Interface are incomplete, eg „PORTA.INTCTRL.[..]“.

• Solution: Do direct access using the Avr-Class

PORTA.INTCTRL.INT0LVL = PORT_INT0LVL_HI_gc

avr.PORTA_INTCTRL and= PORT_INT0LVL_HI_gm 'mask
avr.PORTA_INTCTRL or= PORT_INT0LVL_HI_gc 'config