"Please connect to power..." in order to update to 11.5.1

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https://preview.redd.it/j53uk3gqbhe71.png?width=672&format=png&auto=webp&s=2b836497528acb858453ecef9561344bb28f1a77

I'm getting "Please connect to power before continuing updates" when trying to update to Big Sur 11.5.1. I'm running Big Sur 11.5 on a Ryzen Hackintosh in QEMU/KVM with OpenCore. Am I missing something related to power management? Is there a way to disable this?