rickymurphy on "[Plugin: oik-batchmove] Fatal error: Call to undefined function date_add() in /home4/wiwp/public_html/wp"

Hello,

When I go to oik options -> Scheduled republish there's an error

Fatal error: Call to undefined function date_add() in /home4/wiwp/public_html/wp-content/plugins/oik-batchmove/oik-batchmove.php on line 61

at the bottom of the page.

https://wordpress.org/plugins/oik-batchmove/