What file permission should I change to fix this error?
The specified file temporary://fileo7XApl could not be moved/copied because the destination directory is not properly configured.
This may be caused by a problem with file or directory permissions. More information is available in the system log. https://ftp-origin.drupal.org/files/translations/8.x/address/address-8.x-1.3.de.po could not be saved to translations://.
I installed Drupal 8 Open Social and tried installed some languages, but I get the following errors every time.
I set file permissions and ownership with
chmod -R u+rwX,go+rX,go-w /var/www/html && chown -R www-data:www-data /var/www/html.