Coral Dev Board Mini with Enviromental Sensor Board GPIO problems

I use the Environmental Sensor Board with my Google Coral Dev Board Mini. And all kind of GPIO calls directly on the board lead to the same error, In this example

from periphery import GPIO
gpio = GPIO(138, "low")

OSError: [Errno 22] Invalid argument
periphery.gpio.GPIOError: [Errno 22] Exporting GPIO: Invalid argument

Details:

Linux 4.19.125-mtk #1 SMP PREEMPT Thu Dec 10 02:36:13 UTC 2020 aarch64

Mendel GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
mendel@zippy-orange:~$ python3
Python 3.7.3 (default, Jan 22 2021, 20:04:44)
[GCC 8.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from periphery import GPIO
>>> gpio = GPIO(138, "low")
OSError: [Errno 22] Invalid argument

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.7/dist-packages/periphery/gpio.py", line 1007, in _open
    f_export.write("{:d}\n".format(line))
OSError: [Errno 22] Invalid argument

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python3.7/dist-packages/periphery/gpio.py", line 988, in __init__
    self._open(line, direction)
  File "/usr/local/lib/python3.7/dist-packages/periphery/gpio.py", line 1009, in _open
    raise GPIOError(e.errno, "Exporting GPIO: " + e.strerror)
periphery.gpio.GPIOError: [Errno 22] Exporting GPIO: Invalid argument
>>>

I have the same issue with the Google enviro_demo.py: enviro = EnviroBoard() same errors.

Any ideas? All has been installed from scratch/flash :) just minutes ago. Thank you.

Best, Frank