Update app.py

app.py

@@ -89,7 +89,8 @@ ui_css = """
     margin-left: 8px;
     margin-right: 8px;
     overflow-y: scroll;
-    height: 100;
+    height: 100px;
+    max-height: 100px;
 }
 #output-elems {
     width: 480px;