After setting up the database and website When you open the app for testing, it shows that the server is being maintained

After setting up the database and website . Open chess and cards app The test shows that the server is under maintenance. Please try again later. What's wrong
In the unopened app Time to coordinate . Sign in . The servers in the game room can be turned on normally
In the open app After that, it will be displayed that the server is under maintenance. Please try again later . Then login to the server will display
Database exception : The query timeout has expired （0x80040e31）