Description
A rule identifies multiple target colors to search for. Either no layer was found with symbology matching the target color and symbol part or no features were selected from a matching target layer.
Solution
Verify that the target layer symbology you expected to match the rule has the same color scheme, color values, and symbol part as identified in the rule file. Also verify that the features displayed in the map for target layers are being rendered with the symbol that matches the color and symbol part in the rule file.