Error: MySQL server has gone away

#0 /www/wwwroot/1millionbacklinks.com/db/db_operation.php(296): mysqli->query()
#1 /www/wwwroot/1millionbacklinks.com/modules/module_page_menue.php(11): return_single_ans()
#2 /www/wwwroot/1millionbacklinks.com/site_admin/setting/general_function.php(69): include('...')
#3 /www/wwwroot/1millionbacklinks.com/site_admin/setting/general_function.php(71): {closure}()
#4 /www/wwwroot/1millionbacklinks.com/site_admin/setting/general_function.php(983): include_module()
#5 /www/wwwroot/1millionbacklinks.com/sites/source-lib/BacklinksPageController.php(696): replace_site_vari()
#6 /www/wwwroot/1millionbacklinks.com/sites/source-lib/BacklinksPageController.php(668): BacklinksPageController->outputHeader()
#7 /www/wwwroot/1millionbacklinks.com/sites/source-lib/BacklinksPageController.php(59): BacklinksPageController->output()
#8 /www/wwwroot/1millionbacklinks.com/sites/info.php(17): BacklinksPageController->__construct()
#9 /www/wwwroot/1millionbacklinks.com/sites/cloapedia/info.php(2): include('...')
#10 {main}