As long as its third-party application is not successfully detected, a configurator's icon is grayed-out (as shown below) in the elements pane and in the canvas. A grayed-out configurator can be used in a flow design as usual, but the flow cannot be activated.
Missing elements
The export – import mechanism at the end of an installation procedure can result in broken flows with missing elements. Also starting from Switch 10, configurators can be deleted easily which might also result in missing elements.
Therefore, to avoid this, missing elements and the connection to and from it are not removed. Instead a question mark (?) appears on their icon at the upper right corner. When hovering over such element, the tool tip displays the message WARNING: the flow element cannot be found by Switch.
It is possible to start the flow again by adding the element back to Switch.