General & Access
This is almost always a DNS or Firewall issue. First, verify in your domain registrar that the A-Record points to your server IP. Second, ensure Port 80 and Port 443 are open in your cloud provider's network security group.
You will need SSH access to the server. Log in to your terminal and simply run the command:
sudo stackrium login. The CLI will instantly generate a secure, one-time access link to bypass the login screen. Once inside, go to System Settings to reset your 2FA.
Open the Mail Modal for any domain. Scroll to the bottom of the "Host Locally" tab and click the red "Uninstall Engine" button. Warning: This permanently deletes all local emails and removes Postfix/Dovecot from the system.
App Engines & Deployments
This usually means the port your application is trying to use is already bound to another process, or your code has a fatal syntax error. Use the File Manager to check your application's internal logs, and verify the correct port is set in your Node
server.js or Python app.py.
For strict isolation, Stackrium enforces a "One User, One Identity" rule. Each system user is assigned exactly one unique ED25519 SSH Deploy Key. If you are managing multiple domains that require different Git repositories, you must provision a new User in the Users tab.
Nginx has lost its MIME types mapping. Go to Advanced Web Settings and add a MIME type, or ensure your master Nginx template includes the
include /etc/nginx/mime.types; directive.
It acts as a safety net. It securely targets and kills the specific PM2 background worker associated with the domain, strips the Reverse Proxy rules from Nginx, and restores standard FastCGI PHP execution blocks.
Security, DBs & Performance
Let's Encrypt must verify that you own the domain. If your DNS hasn't fully propagated globally, or if Cloudflare Proxy (the orange cloud) is turned on during installation, Let's Encrypt cannot verify the IP and will fail. Ensure DNS is propagated and proxying is disabled before retrying.
By default, PHP limits uploads. You can increase the global Max Upload Size to 512MB in System Settings. However, for massive SQL files (over 512MB), do not use phpMyAdmin. Upload the
.sql file via File Manager and use the terminal: mysql -u db_user -p database_name < database.sql
No. Stackrium implements strict guardrails, hard-capping Redis at exactly 128MB of RAM. It utilizes an LRU (Least Recently Used) eviction policy, actively deleting old cache queries to prevent Out-Of-Memory (OOM) crashes.
Whenever you change advanced PHP settings, Stackrium automatically tests syntax and restarts the PHP-FPM worker for that domain. If it didn't reflect, check the Live Task Log. If you entered invalid syntax, the server will block the reload to keep your site online.