defender gives php warning on all plugins, can we solve that?

I am trying to speed up the mastersnetwerk site, checking everything with query monitor and see many warnings coming from defender when I activate it:

include(WP_Hummingbird.php): failed to open stream: No such file or directory
include(): Failed opening 'WP_Hummingbird.php' for inclusion (include_path='.:disappointed:usr/local/php70/lib/php')

wp-content/plugins/wp-defender/vendor/hammer/vendor/maxmind-db/reader/autoload.php:40

https://cdn.livechat-static.com/api/file/v2/lc/att-old/8801096/dffda161d35fccbc6d17fe5c4e189fb9/php-warnings.jpg