fix error

diff --git a/src/Game.js b/src/Game.js
index 6b91cebd9e244560ca7f075074e2c9a41b737eb9..e83f05446c60d75e8f94307b4ca6b43e8b0b38d0 100644 (file)
--- a/src/Game.js
+++ b/src/Game.js
@@ -85,7 +85,9 @@ export class Game extends Component {
   }
 
   componentDidUpdate() {
-    this.tipsListRef.current.scrollTop = 10000;
+    if(this.tipsListRef && this.tipsListRef.current) {
+      this.tipsListRef.current.scrollTop = 10000;
+    }
   }
 
   askTip = () => {