Hello, i tried to run a simple test.py as stated on this tutorial https://wiki.helionet.org/tutorials/python and this topic too: Still i get http 500 error when i open https://karplus.helioho.st/cgi-bin/test.py ; I already checked line endings and they are in unix style; plus i wrote the code by hand directly in online text editor, and also tried copy&paste, but got no luck! Permissions are 755 as suggested by tutorial. In logs section I always got this error: End of script output