Timeouts occur more and more frequently on WG servers. This caused the app to stop every time with an error message and wait for input from user, and after ignoring the error reloading the app.
To fix this, I removed the error message of the SOURCE_NOT_AVAILABLE timeout error 504. When the error occurs, one refresh cycle is skipped and the app continues to work witout modal error message stopping the execution.
The latest update is now available and online at WoT Alert - Who Is Online Playing World of Tanks (wotalert.webseodesigners.com).