Use multiple InvMenu instances instead

[rjworks]

what does it mean? Use multiple InvMenu instances instead on $this->menu = InvMenu::createSessionized( InvMenu::TYPE_DOUBLE_CHEST );

[Muqsit]

Create a separate instance of InvMenu for each player if you want a sessionized invmenu Instead of:

$menu = InvMenu::createSessionized(InvMenu::TYPE_DOUBLE_CHEST);
$menu->readonly();
$menu->setName($name);
$menu->setListener($listener);
$menu->send($player1);
$menu->send($player2);

use:

$menu = InvMenu::create(InvMenu::TYPE_DOUBLE_CHEST);
$menu->readonly();
$menu->setName($name);
$menu->setListener($listener);
$menu->send($player1);

$menu = InvMenu::create(InvMenu::TYPE_DOUBLE_CHEST);
$menu->readonly();
$menu->setName($name);
$menu->setListener($listener);
$menu->send($player2);