1) Locate wp-config.php file in the root of your wordpress site.
2) Add following code after / That’s all, stop editing! Happy blogging. /:
<code>1 define('WP_TEMP_DIR', dirname(__FILE__) . '/wp-content/temp/');</code> 
3) Create a new folder temp in wp-content folder.
4) Gracefull restart
If still any issues persist try disabling/enabling the cagefs user.

1) Locate wp-config.php file in the root of your wordpress site.

2) Add following code after /* That’s all, stop editing! Happy blogging. */:


```1 define('WP_TEMP_DIR', dirname(__FILE__) . '/wp-content/temp/');
``` 


3) Create a new folder temp in wp-content folder.

4) Gracefull restart



If still any issues persist try disabling/enabling the cagefs user.

How to get rid of ‘Temporary Folder Missing’ error while uploading media in WordPress