Not sure why i keep getting this error on this challenge.
component:
<aura:component controller="DisplayCaseController">
    <aura:attribute name="record" type="Case"/>
    <ui:button label="Get Case" press="{!c.getcase}"/>
        <p>{!v.record.Status}</p>
        <p>{!v.record.Subject}</p>
        <p>{!v.record.Description}</p>
</aura:component>

controller:
({
    getcase : function(component, record, callback) {
         var action = component.get("c.getCaseFromId");
          action.setParams({
          "caseID": record.id
      })
          action.setCallback(this,function(action){
             if (action.getState() === "SUCCESS") {
                component.set("v.record", action.getReturnValue());
            }
      });
      $A.enqueueAction(action);
    }
 
})
Apex:
public class DisplayCaseControler {

    @AuraEnabled
    public static Case getCaseFromId(Id caseID) { 
        if(caseID == null) { 
            return [SELECT ID, Subject, Description, STATUS from Case LIMIT 1]; 
        }
       
        List<Case> cases = [ SELECT Id, Subject, Description, Status from CASE where ID = :caseID ];
       
        if(cases.size() == 0) { 
            return [SELECT ID, Subject, Description, STATUS from Case LIMIT 1]; 
        } else { 
            return cases[0]; 
        } 
    }  

}