[@robin-w Moderator 6 years, 11 months ago]

looks like it hasn’t converted to an array basically it should read

array (size = 2)
0 => 149
1 => 65

etc.

ok so let’s try replacing

$topicsub_list = array(get_usermeta ($user->id, 'wp__bbp_subscriptions', false)) ;

with

$topicsub_lista = get_usermeta ($user->id, 'wp__bbp_subscriptions', true) ;
$topicsub_list = explode (',' , $topicsub_lista) ;