UnicodeDecodeError: 'utf-8' codec can't decode byte 0xe9 in position 3: invalid continuation byte

[ZeroSebastian]

Is there a specific reason why the package has to be installed with the deprecated setup.py install way?
Whenever I try to install it with this command the package is not found afterwards (it is installed into /usr/lib/python3.7/site-packages and not into /usr/local/lib/python3.7/dist-packages and i honestly do not understand why).
Because of this, I chose to install it with pip3 install . instead.
Whenever I try to import the module in python I get this error (also when executing the examples):
from bme68x import BME68X UnicodeDecodeError: 'utf-8' codec can't decode byte 0xe9 in position 3: invalid continuation byte

Does this happen because I did not install the module with setup.py install? If yes, where did I go wrong? I followed the provided instructions video.

[ZeroSebastian]

Edit: I tried again with the sudo python setup.py install approach and added the path where it is installed ( /usr/lib/python3.7/site-packages) to the python sys path . I still get the same issue.
Can anybody help me with this?

[mcalisterkm]

The BSEC library is supplied by Bosch and you have to request it, and follow the instructions from PI3G.
If you do a pip install the package is missing the BSEC library, and lots of functionality is missing.

BOSCH have patched the library and you will see this a causing other issues, due to the update name change.

What sort of PI (Zero Zero 2, 3 , 4) and what flavour of raspbian are you using?