I entered about 10 securities totalling 100%. It's a static portfolio.

Set optz as std deviation. Risk free rate 3%. No optz date, or 1 6 months ago

Thanks for sharing your portfolio. The issue comes from including USD Cash in the HRP optimization. Since cash has zero return and zero variance, the algorithm hits a divide-by-zero when trying to allocate risk weights (HRP uses inverse variance for allocation). That’s why the optimization fails.

I'd recommend excluding cash from the optimization and treat it as a separate allocation decision (e.g., decide your cash level first, then run HRP on the risky assets).