How to use code to access libcamera(C++/Python)

Raspberry Pi Cameras libcamera
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my version is this :-
Capture
image

and the one that was in the guide you siad to follow :- How to use arducam_64mp & arducam_64mp FQA - #19 by Edward
Ive also installed the 1.0.3 version and i still get the same message.

Could you not create a script, that does all the installing bits when its a fresh version OS on a PI ?