The following affects most if not all of the WPMU DEV's plugins installed on my multisite:
Whenever I activate the "Hide my WP Ghost" by WPPlugins (https://hidemywp.co) most of the admin pages in each of the WPMU plugins installed break (Hummingbird, Smush, SmartCrawl, etc)
I have to assume that the conflict extends to the functionality of these plugins as well.
As I am content with this plugin and its effectiveness I wouldn't want to run into the quick option of uninstalling it in order to resolve the issue.
I have granted you support access already.