I have tried the solutions listed here Plesk 12.5 [Debian 7.9] Error by create a SSL and none work. The final solution fails when I perform the /pip install --upgrade cryptography. I get errors and it doesn’t complete. The error I se is:
error: command ‘gcc’ failed with exit status 1
Failed building wheel for cryptography
Running setup.py clean for cryptography
Failed to build cryptography
Installing collected packages: cffi, cryptography
Found existing installation: cffi 1.5.2
Uninstalling cffi-1.5.2:
Successfully uninstalled cffi-1.5.2
Found existing installation: cryptography 1.3.1
Uninstalling cryptography-1.3.1:
Successfully uninstalled cryptography-1.3.1
Running setup.py install for cryptography … error
Complete output from command /usr/local/psa/var/modules/letsencrypt/venv.W9Q9i/bin/python -u -c “import setuptools, tokenize;file=’/tmp/pip-build-kqimzt/cryptography/setup.py’;exec(compile(getattr(tokenize, ‘open’, open)(file).read().replace(’\r\n’, ‘\n’), file, ‘exec’))” install --record /tmp/pip-iN67yf-record/install-record.txt --single-version-externally-managed --compile --install-headers /usr/local/psa/var/modules/letsencrypt/venv.W9Q9i/include/site/python2.7/cryptography: