Not sure if this is by design or a bug, but thought I'd share it. In SCOM 1807 when adding a widget to a HTML5 dashboard - if I type an illegal character when looking for a group or object and then try to search - it gives me this warning.
The issue is the only way out of this is to close the "Add Widget" slide out by clicking the X in the top right hand corner. The way the interface is laid out, it appears as though I should be able to click the red X in the error message, and it would let me type the name in the search field again.
Anyway I wasn't sure if this is a small issue, or if it's mean to be by design - but thought I'd share it here.