Does anyone have solutions? @admin equirement already satisfied: pyparsing<4,>=2.1.0 in c:\algo\angelone\venv\lib\site-packages (from rdflib->smartapi) (3.1.0) Building wheels for collected packages: PyCrypto Building wheel for PyCrypto (setup.py) ... error error: subprocess-exited-with-error × python setup.py bdist_wheel did not run successfully. │ exit code: 1 ╰─> [2 lines of output] warning: GMP or MPIR library not found; Not building Crypto.PublicKey._fastmath. error: Microsoft Visual C++ 14.0 or greater is required. Get it with "Microsoft C++ Build Tools": https://visualstudio.microsoft.com/visual-cpp-build-tools/ [end of output] note: This error originates from a subprocess, and is likely not a problem with pip. ERROR: Failed building wheel for PyCrypto Running setup.py clean for PyCrypto Failed to build PyCrypto ERROR: Could not build wheels for PyCrypto, which is required to install pyproject.toml-based projects