Step 1: check your own network
Switch between Wi-Fi and mobile data and retry, or open any other website to confirm the network works. Corporate / campus proxies and firewalls sometimes block long-lived connections — changing networks is the fastest way to isolate the cause.
Step 2: check the status page
The status page on this site live-probes the web entry, chat service and account service. If it shows a problem, the issue is on the server side — just wait for recovery instead of fiddling locally.
Your data isn't lost while disconnected
The app has built-in auto-reconnect and message retry: messages that fail while offline are marked and resent automatically after recovery. Your world's memory and history live on the server (or on your machine if self-hosted) and won't be lost to a dropped connection.