issuehunt page inaccessible - 504 error

Now I cannot load https://issuehunt.io/ though it was working about 2 hours ago.

Once I saw the 504 error:
<img width="1018" alt="Screenshot 2020-02-03 at 16 36 36" src="https://user-images.githubusercontent.com/8701039/73667590-c6ac8f80-46a4-11ea-87f8-944430a47867.png">

