You get the following notice when trying to use the button (one-click) update feature in Joomla.
This is usually due to permissions errors or that you haven’t set your /tmp and /logs directory location(s) correctly in the Global Configuration. It is best to use the fully qualified location of those directories and you can find yours by temporarily uploading the following code into a file at the root of your hosting: Pre-fix your /logs and /tmp entries with the full path e.g. /home/user1/public_html/tmp
echo "Your absolute path is: " . getcwd();
Pre-fix your /logs and /tmp entries with the full path e.g. /home/user1/public_html/tmp