A correspondent asks:
I have been through the github documentation and installed the jobe server and i tried to run a c program in my moodle
But it is throwing the error "Jobe server request failed. The URL is blocked. Check the Jobe URL and Moodle's HTTP security settings."
This message means that the Moodle HTTP security settings are not permitting the CodeRunner plugin to communicate with the Jobe server. You need to ask a system administrator to investigate. The relevant settings are found in Site administration > General > Security > HTTP Security. Or possibly Site administration > General > Security > IP blocker.