Fatal error: Uncaught Error: Object of class BaseObject could not be converted to string in /volume1/park5611/xe/classes/xml/xmlquery/argument/ConditionArgument.class.php on line 31

Error: Object of class BaseObject could not be converted to string in /volume1/park5611/xe/classes/xml/xmlquery/argument/ConditionArgument.class.php on line 31

Call Stack:
    0.0001     362336   1. {main}() /volume1/park5611/xe/index.php:0
    0.0142     861088   2. ModuleHandler->procModule() /volume1/park5611/xe/index.php:59
    0.0184     943328   3. ModuleObject->proc() /volume1/park5611/xe/classes/module/ModuleHandler.class.php:863
    0.0194     945784   4. boardView->dispBoardTagList() /volume1/park5611/xe/classes/module/ModuleObject.class.php:443
    0.0198    1022368   5. tagModel->getTagList($obj = class stdClass { public $list_count = 10000; public $module_srl = class BaseObject { public $error = -1; public $message = 'Prepared statement failed: SELECT `module_srl`  FROM `xe_modules` as `modules`   WHERE `site_srl` = ? and `mid` in (?)    MySQL server has gone away'; public $variables = [...]; public $httpStatusCode = NULL } }) /volume1/park5611/xe/modules/board/board.view.php:618
    2.0835    1026088   6. executeQueryArray($query_id = 'tag.getTagList', $args = class stdClass { public $module_srl = class BaseObject { public $error = -1; public $message = 'Prepared statement failed: SELECT `module_srl`  FROM `xe_modules` as `modules`   WHERE `site_srl` = ? and `mid` in (?)    MySQL server has gone away'; public $variables = [...]; public $httpStatusCode = NULL }; public $list_count = 10000; public $count = NULL }, $arg_columns = ???) /volume1/park5611/xe/modules/tag/tag.model.php:44
    2.0835    1026088   7. DB->executeQuery($query_id = 'tag.getTagList', $args = class stdClass { public $module_srl = class BaseObject { public $error = -1; public $message = 'Prepared statement failed: SELECT `module_srl`  FROM `xe_modules` as `modules`   WHERE `site_srl` = ? and `mid` in (?)    MySQL server has gone away'; public $variables = [...]; public $httpStatusCode = NULL }; public $list_count = 10000; public $count = NULL }, $arg_columns = NULL, $type = ???) /volume1/park5611/xe/config/func.inc.php:222
    2.0839    1027176   8. DB->_executeQuery($cache_file = '/volume1/park5611/xe/files/cache/queries/tag.getTagList.1.11.6.mysqli.cache.php', $source_args = class stdClass { public $module_srl = class BaseObject { public $error = -1; public $message = 'Prepared statement failed: SELECT `module_srl`  FROM `xe_modules` as `modules`   WHERE `site_srl` = ? and `mid` in (?)    MySQL server has gone away'; public $variables = [...]; public $httpStatusCode = NULL }; public $list_count = 10000; public $count = NULL }, $query_id = 'tag.getTagList', $arg_columns = NULL, $type = NULL) /volume1/park5611/xe/classes/db/DB.class.php:563
    2.0839    1027952   9. include('/volume1/park5611/xe/files/cache/queries/tag.getTagList.1.11.6.mysqli.cache.php') /volume1/park5611/xe/classes/db/DB.class.php:621
    2.0839    1028464  10. ConditionArgument->__construct($name = 'module_srl', $value = class BaseObject { public $error = -1; public $message = 'Prepared statement failed: SELECT `module_srl`  FROM `xe_modules` as `modules`   WHERE `site_srl` = ? and `mid` in (?)    MySQL server has gone away'; public $variables = ['_query' => 'SELECT `module_srl`  FROM `xe_modules` as `modules`   WHERE `site_srl` = ? and `mid` in (?)    ', '_elapsed_time' => '0.49686']; public $httpStatusCode = NULL }, $operation = 'in') /volume1/park5611/xe/files/cache/queries/tag.getTagList.1.11.6.mysqli.cache.php:7
    2.0839    1028464  11. str_replace($search = ' ', $replace = '', $subject = class BaseObject { public $error = -1; public $message = 'Prepared statement failed: SELECT `module_srl`  FROM `xe_modules` as `modules`   WHERE `site_srl` = ? and `mid` in (?)    MySQL server has gone away'; public $variables = ['_query' => 'SELECT `module_srl`  FROM `xe_modules` as `modules`   WHERE `site_srl` = ? and `mid` in (?)    ', '_elapsed_time' => '0.49686']; public $httpStatusCode = NULL }) /volume1/park5611/xe/classes/xml/xmlquery/argument/ConditionArgument.class.php:31