Error: "There seems to be an issue with this signing method. Please try again by clicking on Send."

Trying to send Matic to Ascendex using https://wallet.matic.network. I’m using metamask with my ledger, which I’ve used a hundred times before.

I’m sending for the first time but getting this error: “There seems to be an issue with this signing method. Please try again by clicking on Send.” MetaMask doesn’t even prompt my ledger for anything!

I’ve tried several times with several browsers.

Any ideas why?