This sounds like an Etrade issue if you are able to Sign In to your Etrade account from the page in TurboTax, and then receive this message.
There are three different Etrade entities in the import list; be sure you have the correct one.
See if you can Sign In to your account outside of TurboTax and retrieve your info to save to your computer.
You can upload the forms from your computer.
Click this link for more info on How to Import 1099 Forms.
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