solved ui probs

application/core/Manialinks/CustomUIManager.php

@@ -82,10 +82,11 @@ class CustomUIManager implements CallbackListener, TimerListener {
 	 */
 	public function handlePlayerJoined(Player $player) {
 		$this->updateManialink($player);
-		//send it again after 5 secs
+
+		//send it again after 500ms
 		$this->maniaControl->timerManager->registerOneTimeListening($this, function($time) use (&$player){
 			$this->updateManialink($player);
-		},5000);
+		},500);
 	}
 
 	/**

application/core/Manialinks/ManialinkManager.php

@@ -131,6 +131,9 @@ class ManialinkManager implements ManialinkPageAnswerListener, CallbackListener
 	public function sendManialink($manialinkText, $logins = null, $timeout = 0, $hideOnClick = false) {
 		$manialinkText = (string) $manialinkText;
 
+		if(!$manialinkText)
+			return true;
+
 		try {
 			if (!$logins) {
 				return $this->maniaControl->client->sendDisplayManialinkPage(null, $manialinkText, $timeout, $hideOnClick);