Check on two layers:

 

Layer location is OK, all elements got valid CM objects assigned

Layer Cables found one issue, one line got no CM object assigned (Cables.58)

 

How to find invalid object on map?

Select all/ individual invalid objects and click on “Go to and select” to find the object on the map

OR

 

Use Data validation to auto delete invalid object on map

 

Start Data validation in workspace menu

 

Select the layer to be validated

 

Select appropriate option