Keep calm. Your funds will not lost, it just the issue with networking from the wallet to the server.
Keep calm as you will lost nothing.
The address will be generated so you don't need to stay on 1 address, it's normal, do not panic. Nothing wrong with your wallet. Your fund is on blockchain, so ...
My wallet now shows the error message: Could not update wallet: Error querying the blockchain. The transaction I did make to receive just 8 hours before.