Hi Gurus,
Custom Lightning App named "Stack" giving "You dont have access to this record Contact "
Trying to follow steps in https://stackoverflow.com/questions/64129038/how-to-implement-full-search-in-case-type-using-salesforce/64172475#64172475 

Here is Org wide defaults of the custom object ERT Case Type data 

Here is apex code of stack

public class Stack {
      @AuraEnabled(cacheable=true)
    public static List<LookupSearchResult> search(String searchTerm, List<String> selectedIds){
        if(String.isBlank(searchTerm) || searchTerm.length() < 2){
            return null;
        }
        String t = '%' + searchTerm + '%'; // decide how you want to search, "starts with", "includes" or what
        
        List<ERT_Case_Type_Data__c> records = [SELECT Id, Name, Level_1__c, Level_2__c, Level_3__c
            FROM ERT_Case_Type_Data__c
            WHERE Level_1__c LIKE :t OR Level_2__c LIKE :t OR Level_3__c LIKE :t
            ORDER BY Level_1__c, Level_2__c, Level_3__c
            LIMIT 20];
        
        /* You could also experiment with SOSL?
        records =  [FIND :('*' + searchTerm + '*') IN ALL FIELDS 
            RETURNING Case_Type_Data__c(Id, Name, Level_1__c, Level_2__c, Level_3__c)][0];
        */
        
        List<LookupSearchResult> results = new List<LookupSearchResult>();
        for(ERT_Case_Type_Data__c ctd : records){
            results.add(new LookupSearchResult(ctd.Id, 'ERT_Case_Type_Data__c', 'standard:case_wrap_up', ctd.Name,
                String.join(new List<String>{ctd.Level_1__c , ctd.Level_2__c, ctd.Level_3__c}, '; ')
            ));
        }
        return results;
    } 

}

Here is Aura component(html part)

<aura:component implements="force:hasRecordId,force:appHostable,flexipage:availableForAllPageTypes,force:lightningQuickAction" access="global" controller="Stack">
    <aura:attribute access="global" type="List" name="selection" default="[]"/>
    <aura:attribute access="global" type="List" name="errors" default="[]"/>

    <lightning:card title="New Case Type">
        
        <lightning:recordEditForm aura:id="myForm" objectApiName="ERT_Case_Type__c" onsubmit="{!c.onSubmit}" onsuccess="{!c.onSuccess}">
        <lightning:messages />
        <c:Lookup selection="{!v.selection}" onSearch="{!c.lookupSearch}" onSelection="{!c.useSelected}" errors="{!v.errors}" label="Search" placeholder="Search Case Types Data"/>
        <lightning:inputField aura:id="Level_1__c" fieldName="Level_1__c" />
        <lightning:inputField aura:id="Level_2__c" fieldName="Level_2__c" />
        <lightning:inputField aura:id="Level_3__c" fieldName="Level_3__c" />
        <lightning:button class="slds-m-top_small" variant="brand" type="submit" name="save" label="Save" />
    </lightning:recordEditForm>
    </lightning:card>
</aura:component>

Here is Aura component - JS controller part

({
    lookupSearch : function(component, event, helper) {
        // Get the lookup component that fired the search event
        const lookupComponent = event.getSource();
        const serverSearchAction = component.get('c.search');
        lookupComponent.search(serverSearchAction);
    },

    useSelected: function(component, event, helper) {
        const selection = component.get('v.selection');
        const errors = component.get('v.errors');
        
        if (selection.length) {
            if(errors.length){  // Clear errors, if any
                component.set('v.errors', []);
            }
            let levels = selection[0].subtitle.split('; ');
            component.find('Level_1__c').set('v.value', levels[0]);
            component.find('Level_2__c').set('v.value', levels[1]);
            component.find('Level_3__c').set('v.value', levels[2]);
        }
    },
    onSubmit: function(component, event, helper) {
        debugger;
        event.preventDefault();       // stop the form from submitting
        var fields = event.getParam('fields');
        fields.Case__c = component.get('v.recordId'); // link to "this" Case
        component.find('myForm').submit(fields);
    },
    onSuccess: function(component, event, helper){
        var toastEvent = $A.get("e.force:showToast");
        toastEvent.setParams({
            "title": "Success!",
            "message": "Case Type saved OK, refreshing",
            "type": "success"
        });
        toastEvent.fire();
        $A.get('e.force:refreshView').fire(); // reload page
    }
})

Please help me in removing this access error

Regards,
Fiona