diff --git a/src/pocketmine/Achievement.php b/src/pocketmine/Achievement.php
index 54ce474f8..273ed5803 100644
--- a/src/pocketmine/Achievement.php
+++ b/src/pocketmine/Achievement.php
@@ -116,7 +116,7 @@ abstract class Achievement{
 	public static function broadcast(Player $player, string $achievementId) : bool{
 		if(isset(Achievement::$list[$achievementId])){
 			$translation = new TranslationContainer("chat.type.achievement", [$player->getDisplayName(), TextFormat::GREEN . Achievement::$list[$achievementId]["name"] . TextFormat::RESET]);
-			if(Server::getInstance()->getConfigBoolean("announce-player-achievements", true) === true){
+			if(Server::getInstance()->getConfigBool("announce-player-achievements", true) === true){
 				Server::getInstance()->broadcastMessage($translation);
 			}else{
 				$player->sendMessage($translation);
diff --git a/src/pocketmine/Player.php b/src/pocketmine/Player.php
index 336e23aa8..db7b96cc0 100644
--- a/src/pocketmine/Player.php
+++ b/src/pocketmine/Player.php
@@ -2404,7 +2404,7 @@ class Player extends Human implements CommandSender, ChunkLoader, IPlayer{
 						}
 
 						$cancelled = false;
-						if($target instanceof Player and $this->server->getConfigBoolean("pvp", true) === false){
+						if($target instanceof Player and $this->server->getConfigBool("pvp", true) === false){
 							$cancelled = true;
 						}
 
@@ -2419,7 +2419,7 @@ class Player extends Human implements CommandSender, ChunkLoader, IPlayer{
 						}elseif($target instanceof Player){
 							if(($target->getGamemode() & 0x01) > 0){
 								return true;
-							}elseif($this->server->getConfigBoolean("pvp") !== true){
+							}elseif($this->server->getConfigBool("pvp") !== true){
 								$cancelled = true;
 							}
 
diff --git a/src/pocketmine/Server.php b/src/pocketmine/Server.php
index 24e4d9253..f7a206c8a 100644
--- a/src/pocketmine/Server.php
+++ b/src/pocketmine/Server.php
@@ -428,7 +428,7 @@ class Server{
 	 * @return bool
 	 */
 	public function getGenerateStructures() : bool{
-		return $this->getConfigBoolean("generate-structures", true);
+		return $this->getConfigBool("generate-structures", true);
 	}
 
 	/**
@@ -442,7 +442,7 @@ class Server{
 	 * @return bool
 	 */
 	public function getForceGamemode() : bool{
-		return $this->getConfigBoolean("force-gamemode", false);
+		return $this->getConfigBool("force-gamemode", false);
 	}
 
 	/**
@@ -537,7 +537,7 @@ class Server{
 	 * @return bool
 	 */
 	public function hasWhitelist() : bool{
-		return $this->getConfigBoolean("white-list", false);
+		return $this->getConfigBool("white-list", false);
 	}
 
 	/**
@@ -551,14 +551,14 @@ class Server{
 	 * @return bool
 	 */
 	public function getAllowFlight() : bool{
-		return $this->getConfigBoolean("allow-flight", false);
+		return $this->getConfigBool("allow-flight", false);
 	}
 
 	/**
 	 * @return bool
 	 */
 	public function isHardcore() : bool{
-		return $this->getConfigBoolean("hardcore", false);
+		return $this->getConfigBool("hardcore", false);
 	}
 
 	/**
@@ -757,9 +757,11 @@ class Server{
 			}
 		}
 		$spawn = $this->getDefaultLevel()->getSafeSpawn();
+		$currentTimeMillis = (int) (microtime(true) * 1000);
+
 		$nbt = new CompoundTag("", [
-			new LongTag("firstPlayed", (int) (microtime(true) * 1000)),
-			new LongTag("lastPlayed", (int) (microtime(true) * 1000)),
+			new LongTag("firstPlayed", $currentTimeMillis),
+			new LongTag("lastPlayed", $currentTimeMillis),
 			new ListTag("Pos", [
 				new DoubleTag("", $spawn->x),
 				new DoubleTag("", $spawn->y),
@@ -1082,7 +1084,7 @@ class Server{
 
 			$level->setTickRate($this->baseTickRate);
 		}catch(\Throwable $e){
-			$this->logger->error($this->getLanguage()->translateString("pocketmine.level.generateError", [$name, $e->getMessage()]));
+			$this->logger->error($this->getLanguage()->translateString("pocketmine.level.generationError", [$name, $e->getMessage()]));
 			$this->logger->logException($e);
 			return false;
 		}
@@ -1234,7 +1236,7 @@ class Server{
 	 *
 	 * @return bool
 	 */
-	public function getConfigBoolean(string $variable, bool $defaultValue = false) : bool{
+	public function getConfigBool(string $variable, bool $defaultValue = false) : bool{
 		$v = getopt("", ["$variable::"]);
 		if(isset($v[$variable])){
 			$value = $v[$variable];
@@ -1256,6 +1258,18 @@ class Server{
 		return false;
 	}
 
+	/**
+	 * @deprecated
+	 *
+	 * @param string $variable
+	 * @param bool   $defaultValue
+	 *
+	 * @return bool
+	 */
+	public function getConfigBoolean(string $variable, bool $defaultValue = false) : bool{
+		return $this->getConfigBool($variable, $defaultValue);
+	}
+
 	/**
 	 * @param string $variable
 	 * @param bool   $value
@@ -1379,7 +1393,7 @@ class Server{
 				if(is_array($value)){
 					$commands = $value;
 				}else{
-					$commands[] = $value;
+					$commands[] = (string) $value;
 				}
 
 				$result[$key] = $commands;
@@ -1528,7 +1542,7 @@ class Server{
 
 			$this->scheduler = new ServerScheduler();
 
-			if($this->getConfigBoolean("enable-rcon", false) === true){
+			if($this->getConfigBool("enable-rcon", false) === true){
 				try{
 					$this->rcon = new RCON(
 						$this,
@@ -1560,9 +1574,9 @@ class Server{
 			$this->banByIP->load();
 
 			$this->maxPlayers = $this->getConfigInt("max-players", 20);
-			$this->setAutoSave($this->getConfigBoolean("auto-save", true));
+			$this->setAutoSave($this->getConfigBool("auto-save", true));
 
-			$this->onlineMode = $this->getConfigBoolean("xbox-auth", true);
+			$this->onlineMode = $this->getConfigBool("xbox-auth", true);
 			if($this->onlineMode){
 				$this->logger->notice($this->getLanguage()->translateString("pocketmine.server.auth", ["enabled", "will"]));
 				$this->logger->notice($this->getLanguage()->translateString("pocketmine.server.authProperty", ["disable", "false"]));
@@ -1572,7 +1586,7 @@ class Server{
 				$this->logger->warning($this->getLanguage()->translateString("pocketmine.server.authProperty", ["enable", "true"]));
 			}
 
-			if($this->getConfigBoolean("hardcore", false) === true and $this->getDifficulty() < Level::DIFFICULTY_HARD){
+			if($this->getConfigBool("hardcore", false) === true and $this->getDifficulty() < Level::DIFFICULTY_HARD){
 				$this->setConfigInt("difficulty", Level::DIFFICULTY_HARD);
 			}
 
@@ -1653,6 +1667,9 @@ class Server{
 			Generator::addGenerator(Nether::class, "nether");
 
 			foreach((array) $this->getProperty("worlds", []) as $name => $options){
+				if(!is_array($options)){
+					continue;
+				}
 				if($this->loadLevel($name) === false){
 					$seed = $options["seed"] ?? time();
 					if(is_string($seed) and !is_numeric($seed)){
@@ -1989,7 +2006,7 @@ class Server{
 		$this->properties->reload();
 		$this->maxPlayers = $this->getConfigInt("max-players", 20);
 
-		if($this->getConfigBoolean("hardcore", false) === true and $this->getDifficulty() < Level::DIFFICULTY_HARD){
+		if($this->getConfigBool("hardcore", false) === true and $this->getDifficulty() < Level::DIFFICULTY_HARD){
 			$this->setConfigInt("difficulty", Level::DIFFICULTY_HARD);
 		}
 
@@ -2097,7 +2114,7 @@ class Server{
 	 * Starts the PocketMine-MP server and starts processing ticks and packets
 	 */
 	public function start(){
-		if($this->getConfigBoolean("enable-query", true) === true){
+		if($this->getConfigBool("enable-query", true) === true){
 			$this->queryHandler = new QueryHandler();
 		}
 
diff --git a/src/pocketmine/entity/Entity.php b/src/pocketmine/entity/Entity.php
index 4a9033792..bbaecbfa6 100644
--- a/src/pocketmine/entity/Entity.php
+++ b/src/pocketmine/entity/Entity.php
@@ -273,8 +273,6 @@ abstract class Entity extends Location implements Metadatable, EntityIds{
 	 * @return bool
 	 */
 	public static function registerEntity(string $className, bool $force = false, array $saveNames = []) : bool{
-		assert(is_a($className, Entity::class, true));
-
 		/** @var Entity $className */
 
 		$class = new \ReflectionClass($className);
diff --git a/src/pocketmine/level/Level.php b/src/pocketmine/level/Level.php
index 36cdac716..918651a66 100644
--- a/src/pocketmine/level/Level.php
+++ b/src/pocketmine/level/Level.php
@@ -1583,7 +1583,7 @@ class Level implements ChunkManager, Metadatable{
 	 * @param Player  $player
 	 * @param Vector3 $vector
 	 *
-	 * @return bool false if spawn protection cancelled the action, true if not.
+	 * @return bool true if spawn protection cancelled the action, false if not.
 	 */
 	protected function checkSpawnProtection(Player $player, Vector3 $vector) : bool{
 		if(!$player->hasPermission("pocketmine.spawnprotect.bypass") and ($distance = $this->server->getSpawnRadius()) > -1){
diff --git a/src/pocketmine/network/mcpe/protocol/DataPacket.php b/src/pocketmine/network/mcpe/protocol/DataPacket.php
index 7ef18142e..908635dae 100644
--- a/src/pocketmine/network/mcpe/protocol/DataPacket.php
+++ b/src/pocketmine/network/mcpe/protocol/DataPacket.php
@@ -519,10 +519,11 @@ abstract class DataPacket extends BinaryStream{
 	 */
 	protected function getEntityLink() : EntityLink{
 		$link = new EntityLink();
+
 		$link->fromEntityUniqueId = $this->getEntityUniqueId();
 		$link->toEntityUniqueId = $this->getEntityUniqueId();
 		$link->type = $this->getByte();
-		$link->byte2 = $this->getByte();
+		$link->bool1 = $this->getBool();
 
 		return $link;
 	}
@@ -534,7 +535,6 @@ abstract class DataPacket extends BinaryStream{
 		$this->putEntityUniqueId($link->fromEntityUniqueId);
 		$this->putEntityUniqueId($link->toEntityUniqueId);
 		$this->putByte($link->type);
-		$this->putByte($link->byte2);
-
+		$this->putBool($link->bool1);
 	}
 }
diff --git a/src/pocketmine/network/mcpe/protocol/types/EntityLink.php b/src/pocketmine/network/mcpe/protocol/types/EntityLink.php
index 76c3ce405..191acadba 100644
--- a/src/pocketmine/network/mcpe/protocol/types/EntityLink.php
+++ b/src/pocketmine/network/mcpe/protocol/types/EntityLink.php
@@ -31,7 +31,13 @@ class EntityLink{
 	public $toEntityUniqueId;
 	/** @var int */
 	public $type;
-	/** @var int */
-	public $byte2;
+	/** @var bool */
+	public $bool1;
 
+	public function __construct(int $fromEntityUniqueId = null, int $toEntityUniqueId = null, int $type = null, bool $bool1 = null){
+		$this->fromEntityUniqueId = $fromEntityUniqueId;
+		$this->toEntityUniqueId = $toEntityUniqueId;
+		$this->type = $type;
+		$this->bool1 = $bool1;
+	}
 }
\ No newline at end of file
diff --git a/src/raklib b/src/raklib
index 775288122..9142e7dec 160000
--- a/src/raklib
+++ b/src/raklib
@@ -1 +1 @@
-Subproject commit 77528812280616f43f460f7f4d40a284c20bcf9e
+Subproject commit 9142e7decec23b302ab470a55e5ed160df4878db
diff --git a/tests/plugins/PocketMine-DevTools b/tests/plugins/PocketMine-DevTools
index 857e8afab..4e28d74c9 160000
--- a/tests/plugins/PocketMine-DevTools
+++ b/tests/plugins/PocketMine-DevTools
@@ -1 +1 @@
-Subproject commit 857e8afab4a7a34c7235ce06e43796bf64581e3d
+Subproject commit 4e28d74c9aafdf51b10bc274ddcf78fcb3b317d4