Warning array_push() expects parameter 1 to be array, null given

Hi,
Ever since updating the Jetpack plugin Im now getting errors on my site and having problems logging in. The error Im getting is;

Warning: array_push() expects parameter 1 to be array, null given in /data/web/virtuals/80757/virtual/www/domains/aproudlove.com/wp-content/plugins/jetpack/modules/omnisearch/omnisearch-posts.php on line 17

Warning: Cannot modify header information - headers already sent by (output started at /data/web/virtuals/80757/virtual/www/domains/aproudlove.com/wp-content/plugins/jetpack/modules/omnisearch/omnisearch-posts.php:17) in /data/web/virtuals/80757/virtual/www/domains/aproudlove.com/wp-includes/pluggable.php on line 1178

Can you help please?

Many thanks

Andrew

https://www.ads-software.com/plugins/jetpack/