as a newbie to Mysensors and platformio this took me a while with the same problem.
The solution (like described above, but not understandable for me at first) is:
platformio.ini add
lib_deps = https://github.com/mysensors/MySensors.git#development
which currently links to Mysensors 2.3.2-beta #ea093e5
and the errror is gone 
Hi mfalkvidd,
thanks for your answer. Today I realize, that I must have been very confused yesterday and mixed up some things and wrote some BS....
To clarify for me and others: The ESP has built-in BT and Wifi interfaces. There are no additional nordic NRF whatever peripherals
Also the Philips Hue uses Zigbee, which is not Bluetooth-compliant.
However are there more examples how to use the ESP32 in a MYSensors environment? Could not find much about the interfacing between Node and Gateway...
thank you for your answer
I guess I accept the challenge and keep you posted