Après récupération d'un fichier de sauvegarde sur une nouvelle VM "On-premise" - le site ne fonctionne plus

[Benjamin_D (Benjamin Decotte)]

might be a long shot though, since you’ve already try the safe mode …
my bet at this point would be the CSP:

Migrating Discourse from one DigitalOcean droplet to another without downtime

SSH to your server, then: cd /var/discourse sudo ./launcher enter app rails c SiteSetting.content_security_policy = false exit exit Note that I’d try the backup restore from CLI first - it solves the actual issue you have (restore a backup) vs the current roadblock (CSP).