[Python] ImportError: libGL.so.1: cannot open shared object file: No such file or directory

I am trying to run cv2, but when I try to import it, I get the following error:

ImportError: libGL.so.1: cannot open shared object file: No such file or directory


My suggested solution online is to install

apt install libgl1-mesa-glx


but this is already installed and the latest version.

NB: I am actually running this on Docker, and I am not able to check the OpenCV version. I tried importing matplotlib and that imports fine.

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