Part of its code never arrived, so nothing could start. The usual cause is a stale cached shell, which is what the button below clears: a plain reload does not bypass the service worker.
Retrying clears this page's cached shell first, which is what escapes a stale service-worker or module cache. None of your chats or settings are kept there, so nothing of yours is lost. If retrying does not help, open the failed URL directly in the browser to see whether the server returns a 404, an error page, or no response at all. Report persistent failures at github.com/nakovan/core/issues, with the line below (one tap selects it).The fault is in this build, so a retry may or may not fetch a fixed copy. Either way it is worth reporting at github.com/nakovan/core/issues, with the line below (one tap selects it).Retrying cannot help until this device is back online, so there is nothing to report yet — the request never left it. Reload once the connection returns.