It appears I was just using an old version and somehow I missed the ‘update plugin’ line.
Thank you anyway.
It happened to me as well.
Deactivating the plugin fixed the issue. At reactivation, the issue appeared again.
I did a quick fix by updating the page with a quick edit.
I had the same problem.
Solved by changing lines 462 and 479:
line 462:
$output .= date_i18n(get_option('date_format'), $item->get_date('U')) . " - ";
line 479:
$output .= ' - ' . date_i18n(get_option('date_format'), $item->get_date('U'));
The error happened because date_il8n requires a UNIX timestamp, while get_date returned a formatted time.
