Hi Toolmaker, thanks for your reply. But my patience was rewarded - survival mode is finally fixed

However in Firefox there is another problem: even with empty main script - an error "[33]" is written.

It seems like it doesn't work only in Google Chrome (I tried in Firefox and it was fine).

When I click at any tile to place my spawn - nothing happens.

In the console it's written:
"WebSocket connection to 'wss://screeps.com/socket/686/doe1drjm/websocket' failed: WebSocket is closed before the connection is established."