This error happens to me too with TT Premier:
T. Rowe Price Mutual Fund Accounts:
A system error has occurred:
["message":Something unexpected happened and we coud not get your documents.
(3002)","code"= "3002","severity"="ERROR"}
I was told by TRP tech support the issue is the issue is that I have some mutual fund accounts in my account showing a zero balance. They also said Turbo Tax now prohibits that. This is nonsense! I had some accounts with TRP that were converted, so I have dividends on an account that is now closed. Also, what about an account that you sell all of, mid-year, yet have dividends and/or capital gains? This is ludicrous, and I don't know why TT is now fixing this. Last year for me if this does not get fixed, I can't see having to enter all this manually EVERY YEAR.
