Are you getting Missing a Temporary Folder error in wordpress, while uploading images / media file or updating wordpress theme or plugin. this error comes due to PHP settings on web hosting. There is a specific PHP setting that defines a temporary folder to be used by apps like WordPress to temporarily store data before saving it to the desired location.
Here is how you can fix this problem, simply by adding this code in your functions.php
define('WP_TEMP_DIR', dirname(__FILE__) . '/wp-content/temp/');