Hello,
This is strange indeed.
I’m guessing that you’d get 524 if Cloudflare times out trying to contact your site. Have you set the connection to your wallet through the admin before it crashed? If so, then check the connection with your wallet. As you know, timeouts are usually due to firewalls.
with regards
P.S. I have moved your topic to the Full Multi Coin Adapter forum because it looks like this is a Bitcoin fork.