I have the latest update for Quicken for Windows,(R59.10). I have found updates to mutual fund and stock accounts have worked normally since the previous failure on May 17, 2022. However, on October 15, 2024 the same issue happened again. It looks like One Step Update works, but the update to Investments, including mutual funds and stocks, has suddenly stopped working. I suspect this is some technical issue at Quicken's end, because of its sudden onset.