Can I disable error messages?

Yes you can if you set the user privileges to "user" Not "administrator". Then the user wont see those error messages.

I would like to have them to be less intrusive. Just yesterday i had a problem with a ventilatsion unit that started to have IP problems(disable/enable fixed those errors), and that spammed the theme full of those error notifications, at that point you cant really use the app anymore. Those error notificatsions should only take small part of the screen not full screen. As an admin i need to see those notificatsions, but when i cant use the app to see what may be wrong with it - then it kind of works against me.@ComfortClick

Thanks for the tip :)