got the same issue recently. (previously used Invest Saver option in 2024-2025 to setup RSP for various Amova ETF-old name: Nikko AM). Contacted the bank & describe the findings to them & after investigation, was advised to go Branch to do the Amova ETF RSP setup. I think non-Treasure login probably not affected by this issue.
Instead of waste more of my time over this matter, I look under digiPortfolio menu & select SaveUp Portfolio (initial lump sum $100 plus recurring mthly $100), currently waiting for setup to be completed (a few biz days) & hope the amt will soon appear under Multiplier tracker. There are other digiPortfolios to choose from, I think all of them can unlock the Invest category.
Maybe the ITteam accidentally (oops!) removed the Invest Saver option & ETF/RSP filtering function while making ‘improvements’ to the Treasures user interface, can only hope that they will put it back under the rightful Invest menu path.