Fatal error: Uncaught TypeError: join(): Argument #1 ($pieces) must be of type array, string given in /var/www/html/plugin/backup.inc.php:110
Stack trace:
#0 /var/www/html/plugin/backup.inc.php(110): join('', NULL)
#1 /var/www/html/lib/plugin.php(108): plugin_backup_action()
#2 /var/www/html/lib/pukiwiki.php(69): do_plugin_action('backup')
#3 /var/www/html/index.php(23): require('/var/www/html/l...')
#4 {main}
thrown in /var/www/html/plugin/backup.inc.php on line 110