openedx.univ-bejaia.dz has an A (IPv4) record (41.111.207.110) but a request to this address over port 80 did not succeed. Your web server must have at least one working IPv4 or IPv6 address.
Get "https://openedx.univ-bejaia.dz:443/.well-known/acme-challenge/letsdebug-test": EOF
Trace:
@0ms: Making a request to http://openedx.univ-bejaia.dz/.well-known/acme-challenge/letsdebug-test (using initial IP 41.111.207.110)
@0ms: Dialing 41.111.207.110
@161ms: Server response: HTTP 302 Object moved
@161ms: Received redirect to https://openedx.univ-bejaia.dz:443/.well-known/acme-challenge/letsdebug-test
@161ms: Dialing 41.111.207.110
@434ms: Experienced error: EOF
A test authorization for openedx.univ-bejaia.dz to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
41.111.207.110: Fetching https://openedx.univ-bejaia.dz:443/.well-known/acme-challenge/LiVuaiMqn3xvMOlo9Zyw9mCperTCPHtU_IqDnPieMoc: Error getting validation data