JetPack error message

I’m gettting the following error message on my multisite websites:

[Sat Jul 09 00:44:25.252296 2016] [:error] [pid 4608] [client xxx.xxx.xx.xx:xxxxx] PHP Warning: Invalid argument supplied for foreach() in /nas/content/live/oursite/wp-content/plugins/jetpack/modules/contact-form/grunion-contact-form.php on line 204, referer: http://subsite-1.oursite.org/wp-admin/index.php

[Sat Jul 09 01:04:00.756928 2016] [:error] [pid 5256] [client xxx.xxx.xx.xx:xxxxx] PHP Warning: Invalid argument supplied for foreach() in /nas/content/live/oursite/wp-content/plugins/jetpack/modules/contact-form/grunion-contact-form.php on line 204, referer: http://oursite.org/wp-admin/network/

[Sat Jul 09 01:07:21.650278 2016] [:error] [pid 5256] [client xxx.xxx.xx.xx:xxxxx] PHP Warning: Invalid argument supplied for foreach() in /nas/content/live/oursite/wp-content/plugins/jetpack/modules/contact-form/grunion-contact-form.php on line 204, referer: http://subsite-2.oursite.org/wp-admin/index.php

https://wordpress.org/plugins/jetpack/