[werk_ag]

f4aii,

Attached is a Config_RX_Pro2PLUS.h file, customized for your sensors (Auriol inclusive), that should work with the LCD display.
As actually we aren't sure if the Data Flash memory is faulty or not, I disabled the data logger functionality in the user config options.

Connect the RTC and BME280 to the board, override existing Config_RX_Pro2PLUS.h, with the one attached, compile and upload.
The BME280 works as a pressure and Temp / Hum sensor, so you don't need to connect your SHT31.
Double check if it is really a BME280 and not just a BMP280.

Code:

// --------------------------------------------------------------------------------------
//   Define the type of your Barometric Pressure Sensor
// --------------------------------------------------------------------------------------
#define Barometric_Sensor  0   // 0= BME280, 1= BMP280 2= BMP085 / BMP180


// --------------------------------------------------------------------------------------
//   Define the type of your inside Temperature / Humidity Sensor
// --------------------------------------------------------------------------------------
#define InsideTH_Sensor  0   // 0= BME280, 1= HTU21D, 2= SHT21, 3= SHT31