EBB36 "MCU 'toolboard' shutdown: Thermocouple reader fault"

I just installed my EBB36 and always get the error "MCU 'toolboard' shutdown: Thermocouple reader fault". I therefore think something in my printer.cfg regarding the MAX31865 is wrong. However I have the same prnter.cfg like @micha.mue suggsted in ratosdevelopement.
This is in my user overrides in printer.cfg:

[extruder]
heater_pin: toolboard: e_heater_pin
sensor_type: MAX31865
sensor_pin: toolboard: PF8 #e_sensor_pin
spi_bus: spi1
rtd_nominal_r:100
rtd_num_of_wires: 2
rtd_reference_r: 430
rtd_use_50Hz_filter: True

I am using a 2wire PT100 on EBB36 with suggested dipswitch order.

Does someone has any clue what could be the reason behind?