User with custom role cannot access wp-admin

First of all I am a WordPress learner. So sorry if my code looks stupid!

I have created a custom theme with a custom user role. I am not developing any plugin.

In my fucntions.php file I have written the following code to create a User role. Users assigned to this role are supposed to login to the admin but only be able to access their Profile pages.

add_action('init', 'yrc_cst_register_role_customer_service_rep');
    
function yrc_cst_register_role_customer_service_rep() {

	$wp_roles = new WP_Roles();

	$wp_roles->remove_role('subscriber');
	$wp_roles->remove_role('editor');
	$wp_roles->remove_role('contributor');
	$wp_roles->remove_role('author');

	$service_rep_caps = array(
	    'read'              => false,
	    'create_posts'      => false,
	    'edit_posts'        => false,
	    'edit_others_posts' => false,
	    'publish_posts'     => false,
	    'manage_categories' => false,
	    'manage_options'    => false,
	);

	add_role('customer_service', __('Customer Service'), $service_rep_caps);
}

I have removed all roles except Administrator, because no other role is required for this portal. Administrator will only create Users with **Customer Service** role.

I have no third party plugin installed in the system.

Users with the custom role are able to login to the system through a custom login page which is working OK. But whenever they are trying to access their Profile page the following error message comes up:

Sorry, you are not allowed to access this page.

Is there anything like 'edit_profile' => true?

I must be doing something wrong but my limited knowledge is not enough to figure this out. Any suggestion would be highly appreciated.