Call to undefined function radius_auth_open()

Hi team,

After a fresh install on a new VM (Ubuntu 22.04), enabling RADIUS and trying to login throws the following error message:

Call to undefined function radius_auth_open() in /opt/observium/html/includes/authentication/radius.inc.php:23

#0: (unknown function) called at [/opt/observium/html/includes/authentication/radius.inc.php:23]

18: {
19: global $rad, $config;
20:
21: if (!is_resource($rad)) {
22: $success = 0;
23: $rad = radius_auth_open();
24:
25: foreach ($config['auth_radius_server'] as $server) {
26: if (radius_add_server($rad, $server, $config['auth_radius_port'], $config['auth_radius_secret'], $config['auth_radius_timeout'], $config['auth_radius_retries']))

{ 27: $success = 1; 28: }

#1: radius_init called at [/opt/observium/html/includes/authentication/radius.inc.php:51]

46: */
47: function radius_authenticate($username, $password)
48: {
49: global $config, $rad;
50:
51: radius_init();
52: if ($username && $rad) {
53: //print_vars(radius_server_secret($rad));
54: radius_create_request($rad, RADIUS_ACCESS_REQUEST);
55:
56: radius_put_attr($rad, RADIUS_USER_NAME, $username);
#2: radius_authenticate called at [/opt/observium/html/includes/authenticate-functions.inc.php:22]

17:
18: if (function_exists($config['auth_mechanism'] . '_authenticate'))

{ 19: // Can't consider remote_user setting here, as for example the LDAP plugin still needs to check 20: // group membership before logging in. So remote_user currently needs to be considered in 21: // mech_authenticate() by the module itself until we split this up, maybe... 22: return call_user_func($config['auth_mechanism'] . '_authenticate', $username, $password); 23: }

24: return mysql_authenticate($username, $password);
25: }
26:
27: // DOCME needs phpdoc block
#3: authenticate called at [/opt/observium/html/includes/authenticate.inc.php:189]

184:
185: // Auth from COOKIEs
186: $auth_success = cookie_auth($cookie_expire);
187:
188: // Auth from ...
189: if (!$_SESSION['authenticated'] && (authenticate($_SESSION['username'], $auth_password) || // login/password
190: (auth_usermanagement() && auth_user_level($_SESSION['origusername']) >= 10))) // FIXME?
191: {
192: // If we get here, it means the password for the user was correct (authenticate() called)
193: // Store encrypted password
194: session_encrypt_password($auth_password, $user_unique_id);
#4: include called at [/opt/observium/html/index.php:74]

69: $_SERVER['PATH_INFO'] = $_SERVER['PATH_INFO'] ?? ($_SERVER['ORIG_PATH_INFO'] ?? '');
70:
71: // Clean global $vars variable, it populated only after correct authenticating
72: unset($vars);
73:
74: include($config['html_dir'] . "/includes/authenticate.inc.php");
75:
76: // Default theme set in global or user setting
77: if ($config['web_theme_default'] === 'system' && isset($_COOKIE['screen_scheme']))

{ 78: $theme = $_COOKIE['screen_scheme']; 79: }

else {

The settings for config.php were take from the previously working installation:

$config['auth_mechanism'] = "radius"; // default, other options: ldap, http-auth, please see documentation for config help

$config['auth_radius_server'] = array('IP');
$config['auth_radius_port'] = Poer;
$config['auth_radius_secret'] = 'X';
$config['auth_radius_timeout'] = 20;
$config['auth_radius_retries'] = 2;
$config['auth_radius_id'] = '';
$config['auth_radius_method'] = 'PAP';
$config['auth_radius_groupmemberattr'] = 'Filter-Id';
$config['auth_radius_groups'][X]['level'] = 10; // Full administrative access
$config['auth_radius_groups']['X']['level'] = 8;
$config['auth_radius_groups']['X']['level'] = 8;
$config['auth_radius_groups']['X']['level'] = 7; // Global read access with secured info (ie rancid configs)
$config['auth_radius_groups']['pfy']['level'] = 5; // Global read access
$config['auth_radius_groups']['support']['level'] = 1; // Only login access, for access to devices/entities require bind entity permissions

Version Information
Observium 24.2.13296 (1st February 2024)
OS Linux 6.5.0-1014-gcp [amd64] (Ubuntu 22.04)
Apache 2.4.52 (Ubuntu)
PHP 8.1.2-1ubuntu2.14 (OPcache: ENABLED) (Memory: 128MB)
Python 3.10.12
MySQL 8.0.36-0ubuntu0.22.04.1 (extension: mysqli 8.1.2-1ubuntu2.14)
SNMP NET-SNMP 5.9.1
RRDtool 1.7.2
Fping 5.1 (IPv4 and IPv6)
Fetch cURL 7.81.0 (OpenSSL/3.0.2, LibZ 1.2.11, LibIDN 2.3.2)

Thanks,
Ned