Hi Fuchs Andreas, I’m also getting the same error. In my case it is lined against tpm-tss2.3. I’m getting the below error. ERROR: cannot load library '/usr/lib64/pkcs11/libtpm2_pkcs11.so.0': /usr/lib64/libtss2-fapi.so.1: undefined symbol: Esys_TRSess_GetAuthRequired. Additionally, ctypes.util.find_library() did not manage to locate a library called '/usr/lib64/pkcs11/libtpm2_pkcs11.so.0' Regards Nitesh -- Regard's Nitesh *-- Feel the Nature and get the utmost happiness.......* * Live the moment....*