Forced change to v2 has broken my site

Hello,

My website automatically updated to v2. This broke my website, and I had to spend several days fixing various elements.

One particular element is still not working.

I had guust put together a custom snippet to hide a particular additional tab that we created from everybody except the venue owner (i.e. the person who claimed the listing).

This snippet was as follows:

// this is the snippet that adds the filter, calling the function below. 
add_filter('geodir_detail_page_tab_list_extend', 'geodir_detail_page_tab_list_extend') ;
 
function geodir_detail_page_tab_list_extend($tab_array)
{
  
  //print_r($tab_array);
  
  // only show edit score to the post owner and siteadmin
  if(isset($tab_array['geodir_editscores'])){
    global $post;
	$user_id = get_current_user_id();
	if($post->post_author != $user_id && $user_id != 10){
	  unset($tab_array['geodir_editscores']);
	}
  }
 
 return $tab_array ;
}

Could you please advise what needs to be changed so that this is fixed and works as intended?