Acknowledging the Login failed error, Tower of Fantasy is also experiencing another “server under maintenance error.” The server may be under maintenance, but players claim this error frequently appears. Despite this, developers are addressing this issue and working to resolve it. It is possible, however, that the error is caused by the player’s mistake.
Moreover, we walked through the things that players unintentionally do. Accordingly, I analyzed the usual practices that cause such “server under maintenance” errors. Unfortunately, there are only a few causes of this error. And I hope these are the only reasons behind the error. Based on such analysis, we have discussed all possible ways to fix the server under maintenance error.

Fix: Tower of Fantasy Server Under Maintenance Error
Developers usually put the server under maintenance to fix bugs and glitches throughout the game. Therefore, they do server maintenance and introduce new updates to meet all players’ needs. Tower of Fantasy was launched in late 2021, and the game has not been updated. In that case, players will receive the same message, which is a severe issue. For this reason, we have provided a couple of fixes below to help you resolve this annoying error.