If you’ve just updated War Robots to a new version, it may take longer than usual for the system to find a battle for you. Don't worry, though, it usually gets better in a few hours when new features are completely rolled out.
Why does it happen during updates?
The reason for that is the process of finding other players to start a battle is determined by factors like players' league rating, mode queue, region, platform, and game version. When you're one of the first to install a new WR update, the majority of players might still be using the older one, and because Commanders with different game versions are not generally playing together, it's what makes your waiting times longer.