3 te chain is now offline, which is a problem, it looks like te chain, which was supposed to have 3 te coins, has been deleted from te wallet.
You can read more about te chain here.
But if you want to keep the te chain you can still use it.
You don’t need to have a te wallet to use it, but it will be slow and you won’t be able to use te chain if te chain goes down for any reason.
So, the only option is to backup your data and backup your coins to a different wallet.
The backup is safe, but not as secure as the te blockchain backup, as the data is not encrypted, and it can be compromised.
The Te Chain will still be there if you have a backup, and you can use the te-chain-wallet-add-recovery-password command to sign your data.