Never heard that site before, but when i visited it, i just know if block.io is only provide us their crypto's wallet
When i read their FAQ, i found this
The sender says your Dogecoin/Bitcoin/Litecoin address is invalid. What gives?
Block.io uses MultiSig addresses that require two signatures for every withdrawal/transaction: yours, and Block.io's. This means that Block.io has no control over your coins, and cannot move your coins without your signatures. This also means that in the event that Block.io is compromised, none of your coins can be lost because of just that event. MultiSig addresses exponentially increase users' wallet security.
If a sending wallet/service says the MultiSig addresses at Block.io are invalid, this means the sending service does not support MultiSig addresses. It is very likely that the service is insecure, and outdated. We recommend you stop using that site or service immediately, and contact the developer for comment
They said, they have no control about their user's money. What exactly the strange errors you got? Can you give us like screenshot or proof?