Deprecated Function create_function()

Hi, when fetching my first repository (bitbucket via https) I encountered the following php error:

Deprecated: Function create_function() is deprecated in ../wp-content/plugins/gitium/inc/class-git-wrapper.php on line 433

My development system needs error logging to be on. It's PHP 7.2, WP5, Debian.

Can you help me with this? Thank you!