When configuring a new stackable (but not stacked) switch I came across this message that correctly identified the state of the switch.
(found on the Stack Tab)
The problem is that the Learn more link takes you to a Stack Members page. No where in that documentation does it talk about enabling/disabling Stack monitoring.
IMHO, the link should lead to a page that gives advice (with pics and an explanation) about removing Stack polling utilizing the "Manage Pollers" page under the "THRESHOLDS & POLLING" section of the "All Settings" menu. (unless there is a better way to do it)