After HF24 was applied to Hive, I could not use Leofinance and other services based on Hive blockchain. Couldn't post, couldn't play Splinterlands. But I saw other users write posts and saw them play battles of the game. I didn't know why.
My Hive Keychain was so old. I had installed it before it was released into Chrome Web Store. Can I use the services again if I update it? I tried, and my problem has been solved. So I am able to write this post. :)
Hope I can help users with the same problem.