Here's a clear explanation of the error “no profiling in Apex, give profile access to that class” and how to fix it with proper code + steps.

✅ Why This Error Happens

This error usually appears when:

1. A profile does NOT have access to the Apex class you're trying to run

• The class is not visible to that profile.
• The Apex class is not added under Profile → Apex Class Access.

2. Running code from Triggers, LWC, Aura, Flow, or API

If the user executing the class doesn’t have Apex class access, Salesforce blocks the execution.

✅ How to Fix It (UI Method)

Step 1: Go to Setup

1. Setup → Profiles
2. Select the profile (e.g., Custom Standard User)

Step 2: Enable Apex Class Access

1. Scroll to Apex Class Access
2. Click Edit
3. Move your Apex class from Available → Enabled
4. Save

✅ Fix Using Permission Set (Recommended Method)

Instead of modifying profiles, create a Permission Set and grant Apex Class Access.

Steps

1. Setup → Permission Sets
2. New Permission Set
3. Go to Apex Class Access
4. Add your class → Save
5. Assign this Permission Set to the user

✅ Fix Using Apex Code (Metadata Deploy)

You cannot directly change profile permissions inside Apex,
but you can check profile access programmatically.

Below is a safe Apex utility to check whether a profile has access:

public class CheckApexClassAccess {

    public static Boolean hasClassAccess(String className) {
        try {
            ApexClass ac = [SELECT Id, Name FROM ApexClass WHERE Name = :className LIMIT 1];
            SetupEntityAccess sea = [
                SELECT Id 
                FROM SetupEntityAccess 
                WHERE SetupEntityId = :ac.Id 
                AND Parent.Profile.Name = :UserInfo.getProfileId().getDescribe().getName()
                LIMIT 1
            ];

            return sea != null;
        } catch (Exception e) {
            return false;
        }
    }
}

Usage

Boolean allowed = CheckApexClassAccess.hasClassAccess('MyClass');

if (!allowed) {
    throw new AuraHandledException('No profile access to this Apex class.');
}

✅ Example: Apex Class Secured with Profile Check

public with sharing class MySecureClass {
    
    @AuraEnabled
    public static String getData() {

        if (!CheckApexClassAccess.hasClassAccess('MySecureClass')) {
            throw new AuraHandledException('Profile does not have access to MySecureClass.');
        }

        return 'You have access!';
    }
}

✅ Shortcut Permission Check (Simpler Code)

if (!FeatureManagement.checkPermission('Your_PermSet_Permission')) {
    throw new UnauthorizedException('Access denied.');
}

Use this when you add a custom permission to a permission set.

✅ Final Summary