Warnings appear when you drag components onto the Canvas to indicate that flow connections need to be made. The number of warnings is displayed on the top-right of the Canvas and correspond to the number of unconnected dots or tabs on each component in a funnel. Dots and flow connections that are grey are set up correctly, and when they’re red, the flow is not complete, and a connection needs to be made.
Connect the components to remove the warnings. To connect components, click the tab on the side of one component and drag it to the tab on the side of the next component in your sequence / flow.