Exception from different folder in src not importing

[ruby shuttle]

I have tried at the top to put import.--- but it still has red text.

[spice slate]

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[ruby shuttle]

package srg.ship;

import srg.exceptions.InsufficientCapcaityException;
import srg.resources.ResourceContainer;

import java.util.List;

public class CargoHold extends Room{

    private int maximumCapacity;
    private List<ResourceContainer> resources;

    public CargoHold(RoomTier tier) {
        super(tier);
        this.maximumCapacity = maximumCapacityFinder(tier);
    }
    public int maximumCapacityFinder(RoomTier tier) {
        if (tier == RoomTier.BASIC) {
            return 5;
        } else if (tier == RoomTier.AVERAGE) {
            return 10;
        } else {
            return 15;
        }
    }
    public int getRemainingCapacity() {
        return getMaximumCapacity() - resources.size();
    }
    public int getMaximumCapacity() {
        maximumCapacityFinder(this.getTier());
        return this.maximumCapacity;
    }
    public List<ResourceContainer> getResources() {
        return resources;
    }
    public void storeResource(ResourceContainer resource) throws
            InsufficientCapcaityException {

    }
}