Error invalid argument supplied

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if ($modules) {
				foreach ($modules as $module) {
					if(isset($module['layout_id'])) {
						if (($module['layout_id'] == $layout_id || $module['layout_id'] == 99999 || $module['layout_id'] == '99999' . $this->config->get( 'config_store_id' )) && $module['position'] == $module_position && $module['status']) {
							$module_data[] = array(
								'code'       => $extension['code'],
								'setting'    => $module,
								'sort_order' => $module['sort_order']
							);				
						}
					}
				}
			}
		}