Every dashboard was running fine, but after server restarted it's empty
https://i.stack.imgur.com/RDOsg.png
I tried to delete and make it again and tried other options not only this "processor utilization" everything is empty just like this (Only Performance widgets tho, details, state and so on are OK). It doesn't show any alerts on any of the menaged agents, all healthy and good.
What could be the problem?