Argument 1 passed

I try to update an old plugin but i have an error when i join m'y server.

PHP:

[16:06:18] [Server thread/CRITICAL]: Could not pass event 'pocketmine\event\player\PlayerPreLoginEvent' to 'PocketPerms v1.0.0': Argument 1 passed to PocketEssential\PocketPerms\PocketPerms::getPlayerGroup() must be an instance of pocketmine\Player, string given, called in /home/arma/plugins/PocketPerms-master/src/PocketEssential/PocketPerms/Permission/AddPermission.php on line 37 on PocketEssential\PocketPerms\PPListener\JoinListener                                         

[16:06:18] [Server thread/CRITICAL]: TypeError: "Argument 1 passed to PocketEssential\PocketPerms\PocketPerms::getPlayerGroup() must be an instance of pocketmine\Player, string given, called in /home/arma/plugins/PocketPerms-master/src/PocketEssential/PocketPerms/Permission/AddPermission.php on line 37" (EXCEPTION) in "PocketPerms-master/src/PocketEssential/PocketPerms/PocketPerms" at line 136


PHP:

$permissions = $this->plugin->getPlayerGroup($this->plugin->getPlayerGroup($player))['Permissions'];//line37
public function getPlayerGroup(Player $player){//line136

 

I realy need help please

 

please post more surrounding code.

 

Because $player is a string and not a player object
Send the code where $player is defined