fix

xim/xim.ts

@@ -48,10 +48,11 @@ export class Xim {
             if (this.client.connected) {
                 this.client.close();
             }
-
-            this.client.onconnected = emptyFunc;
-            this.client.onmsg = emptyFunc;
-            this.client = undefined;
+            if (this.client) {
+                this.client.onconnected = emptyFunc;
+                this.client.onmsg = emptyFunc;
+                this.client = undefined;
+            }
         }
     }
 
@@ -64,6 +65,7 @@ export class Xim {
             this.close();
 
             token().then((t) => {
+                if (!t) return;
                 const client = new XChatClient(url, this.trimToken(t));
                 this.client = client;