Conflict with “YITH Cart Messages” plugin

Hi,
Firstly I love this plugin, thanks for it ??

But there is an strange phenomenon.
I use a lot of plugins but there is one that has a problem: “YITH Cart Messages” plugin
When I activate your plugin, then the “YITH Cart Messages” settings section disappears, and i can’t use it.
If your plugin is deactivated then all works fine.

The “YITH Cart Messages” plugin is the latest version. (1.6.5)
A created a screenscast for easy understanding:

Could you do something with it?
Thanks, Attila