Fatal Error When I Activate Plugin

I get the following fatal error when I try to activate the plugin:

Fatal error: Access level to Admin_Apple_News_List_Table::extra_tablenav() must be public (as in class WP_List_Table) in /chroot/home/metsmeri/metsmerizedonline.com/html/wp-content/plugins/publish-to-apple-news/admin/class-admin-apple-news-list-table.php on line 500

I wrote my host about it and they replied:

This error means there is incorrect code in the file.

394 protected function extra_tablenav( $which ) {

is protected and not public. You can try changing this to see if it fixes it. Since this is a developer issue we are unable to make this change.

Can anybody help?

Thanks,

Jode