ebus Shild C6 = I2C Sensor BMP280 not working

[device2000]

Build: 20251130 (on swap partition)
Chip ID: 7c2c6761c5b4, [ESP32-C6, rev 1]

**The instructions state:** The following shields are usable:

BMP280/BME280/BMP180: tested successfully
I can't get this to work.
What do I need to do? I've tried all the I/O options and various BMP/BME280 chipsets.
The 1-Wire DS18B20 works.
Do you have any tips?