it's not working at the moment for me either.
i just tried importing robinhood llc and it returns the usual error you get when documents are not yet available.
my guess is that while robinhood made the documents available in our personal accounts the API endpoint called by turbotax still doesn't return anything yet, or a problem parsing the data on turboxtaxes side.
Just puting this in case you mixed up apex for robinhood and vice versa
https://robinhood.com/us/en/support/articles/how-to-upload-your-form-1099-to-turbotax/