Component Error - access rights?

Question

I have a Lightning component that works correctly when logged in as a SysAdmin. However, when logged in as a user with a different profile, the error below is received. I have without sharing set in the controller. I thought the without sharing option would eliminate permission problems.

Component

<aura:component implements="force:appHostable,flexipage:availableForAllPageTypes,forceCommunity:availableForAllPageTypes,force:hasRecordId,force:hasSObjectName"
            access="global" 
            controller="PollVotesController">

<aura:attribute name="FeedPollVotes" type="FeedPollVote[]" />
<aura:attribute name="PollID" type="String"  />
<aura:attribute name="PollTitle" type="String" default="Poll"  />
<aura:handler name="init" action="{!c.doInit}" value="{!this}"/>
<lightning:card title="{!v.PollTitle + ' Poll Results'}">
    <aura:set attribute="body">
        <table class="slds-table slds-table_bordered slds-table_cell-buffer">
            <thead>
                <tr class="slds-text-title_caps">
                    <th scope="col">Date</th>
                    <th scope="col">Name</th>
                    <th scope="col">Organization</th>  
                    <th scope="col">Tier</th>                          
                    <th scope="col">Choice</th>
                </tr>
            </thead>
            <tbody>
                <aura:iteration items="{!v.FeedPollVotes}" var="feedpollvotes">
                    <tr scope="row">
                        <td> {!feedpollvotes.LastModifiedDate}</td>
                        <td> {!feedpollvotes.CreatedBy.Name}</td>
                        <td> {!feedpollvotes.CreatedBy.User_Organization_Name__c}</td>                            
                        <td> {!feedpollvotes.CreatedBy.User_Tier_Level__c}</td>                                                        
                        <td> {!feedpollvotes.Choice.ChoiceBody}</td>                            
                    </tr>
                </aura:iteration>
            </tbody>
        </table>
    </aura:set>
</lightning:card>

Client Controller

({
doInit: function(component, event, helper) {

    var action = component.get("c.getFeedPollVotes");
    action.setCallback(this, function(data) {

        component.set("v.FeedPollVotes", data.getReturnValue());
        console.log(data.getReturnValue());
    });
    $A.enqueueAction(action);
}

})

Server Controller

public without sharing class PollVotesController {
    @AuraEnabled
    public static List<FeedPollVote> getFeedPollVotes(){
        return  [
            SELECT LastModifiedDate, CreatedBy.Name, CreatedBy.User_Organization_Name__c, 
                CreatedBy.User_Tier_Level__c, Choice.ChoiceBody 
            from FeedPollVote
        ];
    }
}

Answer 1

Does that non-admin profile have read access to the FeedPollVote object? I've never used the object before, but also if it has a parent that could also impact access if it controls sharing access to the child (FeedPollVote). Although if it still failed with "without sharing" then my guess would be object permission settings for that profile.