Class not found

When i use a command then i will got a message in the console. In the error says the console that a class not found is. The class is uCore\C but i havent a class with that name

 

Please show us your code or we can't help you

 

PHP:

if(strtolower($cmd->getName() === "nick")){
            if($sender->isOP() || $sender->hasPermission("nick.cmd")){
                if($sender instanceof Player){
                    $nick = $this->RandomNick();
                    $this->refreshNicks();
                    $config->set(strtolower($sender->getName()), $nick);
                    $config->save();
                    $skins = [];
                    $server = $this->getServer();
                    $players = $server->getOnlinePlayers();
                    $selected = $players[array_rand($players)];
                    $skin = $selected->getSkinData();
                    $skinId = $selected->getSkinId();
                    $sender->setSkin($skin, $skinId);
                    $sender->sendMessage($this->prefix." Dein Nick ist ". C::GOLD.$nick.C::WHITE." mach ".C::GOLD."/unnick".C::WHITE." um dich zu entnicken");
                    $sender->sendMessage($this->prefix." Falls der Nick nicht kommt nochmal §6/nick machen");
                } else {
                    $sender->sendMessage("Benutze den command ingame");
                }
            }
        }

 

looks like you are missing:

Code:

use pocketmine\utils\TextFormat as C;