Can not create top cpu device widget

Hi guys.
Im trying to create a cpu top-devices widget on my dashboard.
Default traffic top device is created ok , but when I change top query to “cpu usage” , widget shows:
#### No devices found within interval..
Very strange, this works ok in other servers I have.
btw , dont know what info should share with you , please let me know.
Cpu graphs for each device are ok…
BTW: trying to create top storage and memory dont work … only interface traffic.

Regards.
Leandro.

Umh… It works for me

Here it does not:

After following all sugested fixed from ./validate.php it begin working.
Thanks