This message

This message started popping up every time I try updating a page.

Warning: Invalid argument supplied for foreach() in /srv/users/serverpilot/apps/tyreautoparts/public/wp-content/plugins/wp-hummingbird/core/modules/class-module-page-caching.php on line 1018

Warning: Invalid argument supplied for foreach() in /srv/users/serverpilot/apps/tyreautoparts/public/wp-content/plugins/wp-hummingbird/core/modules/class-module-page-caching.php on line 1018

Warning: Cannot modify header information - headers already sent by (output started at /srv/users/serverpilot/apps/tyreautoparts/public/wp-content/plugins/wp-hummingbird/core/modules/class-module-page-caching.php:1018) in /srv/users/serverpilot/apps/tyreautoparts/public/wp-admin/post.php on line 198

Warning: Cannot modify header information - headers already sent by (output started at /srv/users/serverpilot/apps/tyreautoparts/public/wp-content/plugins/wp-hummingbird/core/modules/class-module-page-caching.php:1018) in /srv/users/serverpilot/apps/tyreautoparts/public/wp-includes/pluggable.php on line 1216