Powerdns Unix Agent module throws error

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⢰⡏⠀⠀⠀⠀⠈⣿⣷⣤⡐⣄⣽⡾⠧⠤⠤⣤⣤⣾⣿⣾⣿⣯⣀⡀⠀⠀⠀⢠⡇⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀

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⠀⠀⠀⢸⣿⣿⡇⠈⢻⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠻⣿⣿⡟⢠⣿⣿⡟⠁⠀⠀⠀⠀⠙⣻⣿⣿⣆⠀⠀⠀⠀⠀

⠀⠀⠀⠈⣿⣿⣷⡈⠛⠿⣿⣿⡆⠻⢿⣿⣽⣿⣯⣿⠿⠃⠀⠻⠛⣰⣿⣿⠏⠀⠀⠀⠀⢀⣙⣿⣿⣿⣿⣿⣧⡀⠀⠀⠀

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⠀⠀⠀⣿⣿⣿⣿⣿⣿⣿⣥⣄⡀⠀⠀⠀⠀⠀⠀⠀⠀⣸⣦⣾⣿⣿⣿⣿⣿⣿⡿⠿⠿⡟⠿⣿⣟⡿⢿⡛⠀⣘⣿⣿⡆

⠀⠀⠀⢿⣿⣿⠿⠿⠿⠿⢿⣿⣿⣷⣿⡆⠀⠀⣶⣶⣾⡿⠛⠛⠛⠛⠻⣿⣿⣿⡟⠉⠀⠀⠀⠈⠁⠁⢀⢀⠲⣬⣿⣿⡇

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⠀⠀⠀⠀⠀⠀⠀⢀⣀⣀⣀⣀⣠⡴⠊⠉⠀⠈⢹⠿⣿⣿⣿⣿⣿⣷⣾⣿⠾⡿⡿⠿⣷⣦⣿⣿⣿⣿⣿⡟⠁⠀⠀⠀⠀

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Oops! Something went wrong! You may want to report this to the Observium developers.explode(): Argument #2 ($string) must be of type string, array given in /opt/observium/includes/polling/applications/powerdns.inc.php:17Stack trace:#0: (unknown function) called at [/opt/observium/includes/polling/applications/powerdns.inc.php:17]

12: */

13: 

14: if (!empty($agent_data['app']['powerdns'])) {

15: $app_id = discover_app($device, 'powerdns');

16: 

17: foreach (explode(",", $agent_data['app']['powerdns']) as $line) {

18: [$key, $value] = explode("=", $line, 2);

19: $powerdns[$key] = $value;

20: }

21: 

22: $data = [#1: explode called at [/opt/observium/includes/polling/applications/powerdns.inc.php:17]

12: */

13: 

14: if (!empty($agent_data['app']['powerdns'])) {

15: $app_id = discover_app($device, 'powerdns');

16: 

17: foreach (explode(",", $agent_data['app']['powerdns']) as $line) {

18: [$key, $value] = explode("=", $line, 2);

19: $powerdns[$key] = $value;

20: }

21: 

22: $data = [#2: include called at [/opt/observium/includes/polling/applications.inc.php:51]

46: echo $app_type . ' ';

47: 

48: // One include per application type. Multiple instances currently handled within the application code

49: $app_include = $config['install_dir'] . '/includes/polling/applications/' . $app_type . '.inc.php';

50: if (is_file($app_include)) {

51: include($app_include);

52: } else {

53: echo($app_type . ' include missing! ');

54: }

55: 

56: }#3: include called at [/opt/observium/includes/polling/functions.inc.php:315]

310: 

311: print_cli_heading("Module Start: %R" . $module);

312: 

313: $m_start = utime();

314: 

315: include($config['install_dir'] . "/includes/polling/$module.inc.php");

316: 

317: $m_end = utime();

318: 

319: $m_run                                    = round($m_end - $m_start, 4);

320: $device_state['poller_mod_perf'][$module] = $m_run;#4: poll_device called at [/opt/observium/poller.php:175]

170: $params[] = $config['poller_id'];

171: }

172: 

173: foreach (dbFetch($query, $params) as $device) {

174: $device = dbFetchRow("SELECT * FROM `devices` WHERE `device_id` = ?", [$device['device_id']]);

175: poll_device($device, $options);

176: $polled_devices++;

177: }

178: 

179: $poller_end  = utime();

180: $poller_run  = $poller_end - $poller_start;