AlliedModders - [ 1.6.3 ] Errors in the control web panel

Hello ,

i am getting the following errors after going to the admin panel tab:
Code:
Error: the XML response that was returned from the server is invalid. Received:

( ! ) Warning: file_get_contents(): php_network_getaddresses: getaddrinfo failed: Temporary failure in name resolution in /var/www/sourcebans/includes/sb-callback.php on line 2316

Call Stack

#        Time        Memory        Function        Location

1        0.0000        399592        {main}( )        .../index.php:0

2        0.0053        778280        xajax->processRequests( )        .../index.php:33

3        0.0054        778280        xajax->_callFunction( )        .../xajax.inc.php:744

4        0.0054        778280        CheckVersion( )        .../xajax.inc.php:1095

5        0.0054        778392        file_get_contents ( )        .../sb-callback.php:2316



( ! ) Warning: file_get_contents(https://sbpp.github.io/version.json): failed to open stream: php_network_getaddresses: getaddrinfo failed: Temporary failure in name resolution in /var/www/sourcebans/includes/sb-callback.php on line 2316

Call Stack

#        Time        Memory        Function        Location

1        0.0000        399592        {main}( )        .../index.php:0

2        0.0053        778280        xajax->processRequests( )        .../index.php:33

3        0.0054        778280        xajax->_callFunction( )        .../xajax.inc.php:744

4        0.0054        778280        CheckVersion( )        .../xajax.inc.php:1095

5        0.0054        778392        file_get_contents ( )        .../sb-callback.php:2316



( ! ) Warning: Cannot modify header information - headers already sent by (output started at /var/www/sourcebans/includes/sb-callback.php:2316) in /var/www/sourcebans/includes/xajax.inc.php on line 766

Call Stack

#        Time        Memory        Function        Location

1        0.0000        399592        {main}( )        .../index.php:0

2        0.0053        778280        xajax->processRequests( )        .../index.php:33

3        0.0069        780072        header ( )        .../xajax.inc.php:766

Error]]>Error Retrieving Latest Release.]]>
also is not refreshing the admins on the server ... how can i fix it ?