Well, you generally always have 2 options:
1) Do what the error message says:
2) Import your mnemonic code into another wallet.
If you are not in a hurry, option 1) is the easier and less risky one.
If you want to access/send your coins fast, option 2) would be better. But make sure to use reputable wallets and verify their signature.
For everyone finding this thread when searching for the error message:
This is a connection issue. Your coins are and will be safe. If you don't mind waiting, simply check again in a few days.
If you are in a hurry, take a deep breath and properly use another wallet. Don't rush it and play it safe.