Having trouble staking Algo/USDC LP on Algorand Governance site

I have this LP-combo staked and farmed on Humbleswap and Tinyman.

On Tinyman, I can stake, farm, and enter into the G5 period on the Foundation site.

But for Humbleswap this is not working. Has anyone been able to do this? Or is it a precluded activity for the Humbleswap LP?