Cause: PHP error or missing extension.
Solution: Enable WP_DEBUG-style logging by editing local/config/database.inc.php and adding error_reporting(E_ALL);. Check your server’s PHP error log.
Edit your php.ini or add to .htaccess:
memory_limit = 256M
upload_max_filesize = 128M
post_max_size = 132M
max_execution_time = 300
A: Yes. During installation, choose your primary language. Later, you can add additional languages via Plugins -> Languages. piwis 3 install