The FBI warns Americans against using cryptocurrency money transmitting services that are not registered as Money Services Businesses ( MSB ) , it could be the cause that block.io is closing it service , as i know this site/company does not have a money transmiter license
https://www.ic3.gov/Media/Y2024/PSA240425If you have an account with them ,you will get a mesage like that:
Hi
Block.io is sunsetting its wallet and developer API on May 31st. This means you will not be able to access any services on
https://block.io after May 31st, 2024.
Please move your coins elsewhere, and always retain backups of your private keys. Remember that your account's private keys (retrievable via
https://block.io/dashboard/settings) control your coins, not Block.io.
You will no longer be able to access your account, its data, or developer APIs at Block.io after May 31st, 2024.
Kind regards,
The Block.io Team