Update app.py

app.py

@@ -27,7 +27,7 @@ def prepare_features(data):
         data['price'].astype(str) + ' ' +
         data['average_playtime_2weeks'].astype(str) + ' ' +
         data['tags'].astype(str) + ' ' +
-        data['average_playtime_forever']
+        data['average_playtime_forever'].astype(str)
     )
     
     vectorizer = TfidfVectorizer()