Error is generate by MainClass:
PDOException Object
(
    [message:protected] => SQLSTATE[70100]: <>: 1927 Connection was killed
    [string:Exception:private] => 
    [code:protected] => 70100
    [file:protected] => /var/www/vhost/OKFLORA/okflora.ro/global/main/classes/mySQLConnection.php
    [line:protected] => 46
    [trace:Exception:private] => Array
        (
            [0] => Array
                (
                    [file] => /var/www/vhost/OKFLORA/okflora.ro/global/main/classes/mySQLConnection.php
                    [line] => 46
                    [function] => query
                    [class] => PDO
                    [type] => ->
                )

            [1] => Array
                (
                    [file] => /var/www/vhost/OKFLORA/okflora.ro/global/main/classes/mySQLConnection.php
                    [line] => 63
                    [function] => ensureConnection
                    [class] => mySQLConnection
                    [type] => ->
                )

            [2] => Array
                (
                    [file] => /var/www/vhost/OKFLORA/okflora.ro/global/global/menu/storages/menuitemManager.php
                    [line] => 171
                    [function] => prepare
                    [class] => mySQLConnection
                    [type] => ->
                )

            [3] => Array
                (
                    [file] => /var/www/vhost/OKFLORA/okflora.ro/global/global/menu/storages/menuitemManager.php
                    [line] => 142
                    [function] => checkdelete
                    [class] => menuitemManager
                    [type] => ->
                )

            [4] => Array
                (
                    [file] => /var/www/vhost/OKFLORA/okflora.ro/global/main/classes/Abstract/genericManager.abstract.php
                    [line] => 317
                    [function] => setobjfull
                    [class] => menuitemManager
                    [type] => ->
                )

            [5] => Array
                (
                    [file] => /var/www/vhost/OKFLORA/okflora.ro/global/global/menu/storages/menuitemManager.php
                    [line] => 22
                    [function] => getall
                    [class] => genericManager
                    [type] => ->
                )

            [6] => Array
                (
                    [file] => /var/www/vhost/OKFLORA/okflora.ro/www/modules/_menu/menu.mod.php
                    [line] => 158
                    [function] => getall
                    [class] => menuitemManager
                    [type] => ->
                )

            [7] => Array
                (
                    [file] => /var/www/vhost/OKFLORA/okflora.ro/www/modules/_menu/menu.mod.php
                    [line] => 30
                    [function] => getmenulistfromsection
                    [class] => menuModule
                    [type] => ->
                )

            [8] => Array
                (
                    [file] => /var/www/vhost/OKFLORA/okflora.ro/www/modules/_default/default.mod.php
                    [line] => 1351
                    [function] => mainmenu
                    [class] => menuModule
                    [type] => ->
                )

            [9] => Array
                (
                    [file] => /var/www/vhost/OKFLORA/okflora.ro/www/modules/_default/default.mod.php
                    [line] => 1015
                    [function] => mainbarmenu_links
                    [class] => defaultModule
                    [type] => ->
                )

            [10] => Array
                (
                    [file] => /var/www/vhost/OKFLORA/okflora.ro/www/modules/_default/default.mod.php
                    [line] => 735
                    [function] => mainbarmenu
                    [class] => defaultModule
                    [type] => ->
                )

            [11] => Array
                (
                    [function] => topcontent
                    [class] => defaultModule
                    [type] => ->
                )

            [12] => Array
                (
                    [file] => /var/www/vhost/OKFLORA/okflora.ro/global/main/classes/Abstract/genericApplication.class.php
                    [line] => 104
                    [function] => invoke
                    [class] => ReflectionMethod
                    [type] => ->
                )

            [13] => Array
                (
                    [file] => /var/www/vhost/OKFLORA/okflora.ro/www/appl/application.class.php
                    [line] => 966
                    [function] => callFuncFromModule
                    [class] => genericApplication
                    [type] => ->
                )

            [14] => Array
                (
                    [file] => /var/www/vhost/OKFLORA/okflora.ro/www/appl/application.class.php
                    [line] => 266
                    [function] => showMainPage
                    [class] => application
                    [type] => ->
                )

            [15] => Array
                (
                    [file] => /var/www/vhost/OKFLORA/okflora.ro/global/main/mainClass.class.php
                    [line] => 263
                    [function] => processModuleRequest
                    [class] => application
                    [type] => ->
                )

            [16] => Array
                (
                    [file] => /var/www/vhost/OKFLORA/okflora.ro/global/main/mainClass.class.php
                    [line] => 241
                    [function] => processRequest
                    [class] => mainClass
                    [type] => ->
                )

            [17] => Array
                (
                    [file] => /var/www/vhost/OKFLORA/okflora.ro/www/index.php
                    [line] => 52
                    [function] => processSiteRequest
                    [class] => mainClass
                    [type] => ->
                )

            [18] => Array
                (
                    [file] => /var/www/vhost/OKFLORA/okflora.ro/www/indexnginx.php
                    [line] => 120
                    [args] => Array
                        (
                            [0] => /var/www/vhost/OKFLORA/okflora.ro/www/index.php
                        )

                    [function] => require_once
                )

            [19] => Array
                (
                    [file] => /var/www/vhost/OKFLORA/okflora.ro/www/indexnginx.php
                    [line] => 331
                    [function] => finish
                )

            [20] => Array
                (
                    [file] => /var/www/vhost/OKFLORA/okflora.ro/www/indexnginx.php
                    [line] => 422
                    [function] => checkSpecial
                )

        )

    [previous:Exception:private] => 
    [errorInfo] => Array
        (
            [0] => 70100
            [1] => 1927
            [2] => Connection was killed
        )

)