Sorry to hear. I know a few people who are using Keychain browser who are experiencing the same. But I see you are using Hivesigner. Have you used it before and it worked? You can make a thread and add the hashtag #feedback so the devs or Khal will see it.
In the meantime, you can vote from other frontend :)
It has been working very well for me until yesterday, even the keychain browser wasn't working it too.