How to update profile photo from the UM Account page?

I have used a function to insert the photo uploader into the UM Accounts page. So logged in members can update their profiles from there. This puts the images uploaders into the page BUT the Image uploader gives an Error ‘Invalid form ID’ when an image is uploaded.

add_filter( 'um_account_tab_general_fields', 'um_011921_add_profile_photo_uploader', 10, 2 );
function um_011921_add_profile_photo_uploader( $args, $shortcode_args ) {

    $args = 'register_profile_photo,' . $args;
    return $args;
}

Any ideas how to get that working?

Many thanks