I have tried this code, but it wasn’t succesful
add_action('profile_update', 'prevent_email_change', 10, 3);
function prevent_email_change($user_id, $old_user_data)
{
$user = get_user_by('id', $user_id);
if ($user->user_email != $old_user_data->user_email)
{
$user->user_email = $old_user_data->user_email;
}
}
add_action('wpmem_pre_update_data', 'user_update_prevent_email');
function user_update_prevent_email($fields)
{
$user = wp_get_current_user();
$fields['user_email'] = $user->user_email;
$_POST['user_email'] = $user->user_email;
}