500 server error after installation

[aanandi-in]

CloudPanel version(s) affected

2.5.4

Description

Oops! An Error Occurred
The server returned a "500 Internal Server Error".
Something is broken. Please let us know what you were doing when this error occurred. We will fix it as soon as possible. Sorry for any inconvenience caused.

How to reproduce

Login to Hatzer dedicated server
Then Follow the prompt :
apt update && apt -y upgrade && apt -y install curl wget sudo

curl -sS https://installer.cloudpanel.io/ce/v2/install.sh -o install.sh;
echo "8146dbe0a488e7088b04071b0c34d59aa0ab1fe9dcec382d395fd155c9e6c476 install.sh" |
sha256sum -c && sudo CLOUD=hetzner DB_ENGINE=MARIADB_12.3 bash install.sh

Possible Solution

No response

Additional Context

[aanandi-in]

After checking the mysql after installation :

root@Ubuntu-noble-latest-amd64-base / # sudo systemctl status mysql
○ mariadb.service - MariaDB 12.3.3 database server
Loaded: loaded (/usr/lib/systemd/system/mariadb.service; enabled; preset: enabled)
Drop-In: /etc/systemd/system/mariadb.service.d
└─migrated-from-my.cnf-settings.conf, protect.conf
Active: inactive (dead) since Mon 2026-08-24 09:05:35 CEST; 2min 49s ago
Duration: 13h 4min 43.266s
Docs: man:mariadbd(8)
https://mariadb.com/docs/server/server-management/starting-and-stopping-mariadb/systemd
Process: 139674 ExecStart=/usr/sbin/mariadbd $MYSQLD_OPTS (code=exited, status=0/SUCCESS)
Main PID: 139674 (code=exited, status=0/SUCCESS)
Status: "MariaDB server is down"
CPU: 6.248s

Aug 23 20:00:50 Ubuntu-noble-latest-amd64-base.zst (mariadbd)[139674]: mariadb.service: Referenced but unset environment variable evaluates to an empty string: MYSQLD_OPTS
Aug 23 20:00:50 Ubuntu-noble-latest-amd64-base.zst mariadbd[139674]: 2026-08-23 20:00:50 0 [Warning] Could not increase number of max_open_files to more than 32768 (request: 65535)
Aug 23 20:00:51 Ubuntu-noble-latest-amd64-base.zst systemd[1]: Started mariadb.service - MariaDB 12.3.3 database server.
Aug 23 20:00:51 Ubuntu-noble-latest-amd64-base.zst /etc/mysql/debian-start[139696]: Reading datadir from the MariaDB server failed. Got the following error when executing the 'mysql' command line client
Aug 23 20:00:51 Ubuntu-noble-latest-amd64-base.zst /etc/mysql/debian-start[139696]: ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)
Aug 23 20:00:51 Ubuntu-noble-latest-amd64-base.zst /etc/mysql/debian-start[139696]: FATAL ERROR: Upgrade failed
Aug 23 20:00:51 Ubuntu-noble-latest-amd64-base.zst /etc/mysql/debian-start[139704]: Checking for insecure root accounts.
Aug 23 20:00:51 Ubuntu-noble-latest-amd64-base.zst debian-start[139707]: ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)
Aug 24 09:05:35 Ubuntu-noble-latest-amd64-base.zst systemd[1]: mariadb.service: Deactivated successfully.
Aug 24 09:05:35 Ubuntu-noble-latest-amd64-base.zst systemd[1]: mariadb.service: Consumed 6.248s CPU time, 108.0M memory peak, 0B memory swap peak.
root@Ubuntu-noble-latest-amd64-base / #