diff --git a/src/main/java/cn/nukkit/utils/ClientChainData.java b/src/main/java/cn/nukkit/utils/ClientChainData.java
index dbb1fac22da..5a99ab58862 100644
--- a/src/main/java/cn/nukkit/utils/ClientChainData.java
+++ b/src/main/java/cn/nukkit/utils/ClientChainData.java
@@ -3,6 +3,7 @@
 import cn.nukkit.network.encryption.EncryptionUtils;
 import cn.nukkit.network.protocol.LoginPacket;
 import com.google.gson.Gson;
+import com.google.gson.JsonElement;
 import com.google.gson.JsonObject;
 import com.google.gson.reflect.TypeToken;
 import com.nimbusds.jose.JWSObject;
@@ -249,7 +250,11 @@ private void decodeChainData() {
                 if (extra.has("displayName")) this.username = extra.get("displayName").getAsString();
                 if (extra.has("identity")) this.clientUUID = UUID.fromString(extra.get("identity").getAsString());
                 if (extra.has("XUID")) this.xuid = extra.get("XUID").getAsString();
-                if (extra.has("titleId")) this.titleId = extra.get("titleId").getAsString();
+
+                JsonElement titleIdElement = extra.get("titleId");
+                if (titleIdElement != null && !titleIdElement.isJsonNull()) {
+                    this.titleId = titleIdElement.getAsString();
+                }
             }
 
             if (chainMap.has("identityPublicKey")) {