[Plugin: All-in-One Calendar] php-errors right after update

After the automated update i got:

Warning: Wrong parameter count for array_unique() in /var/www/piraten-steglitz-zehlendorf.de/wp-content/plugins/all-in-one-event-calendar/all-in-one-event-calendar.php on line 271

Warning: Invalid argument supplied for foreach() in /var/www/piraten-steglitz-zehlendorf.de/wp-content/plugins/all-in-one-event-calendar/all-in-one-event-calendar.php on line 274

Fatal error: Class ‘Ai1ec_Settings’ not found in /var/www/piraten-steglitz-zehlendorf.de/wp-content/plugins/all-in-one-event-calendar/all-in-one-event-calendar.php on line 286

site admin is notified to deactivate the plugin. i myself don’t have write-access on the dirs.

https://www.ads-software.com/extend/plugins/all-in-one-event-calendar/