Photoshop pressure (Mac Big Sur - Photoshop 2022)

I’m hoping to use my Morph with Photoshop (Mac OS Big Sur - Photoshop 2022) but it isn’t reading pressure changes. When I go to look at the brush settings there’s an exclamation mark next to PRESSURE (see the attached image)
I’ve managed to download and activate the driver (with lot’s of mac security hoop-jumping) and i’ver restarted my computer, but it still won’t recognize pressure. Am I missing something?

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