Sudowrite does not work on IpadOS 17.2 beta in Safari on an iPad.

I am running 17.2 public beta. Since upgrading from 17.1, sudowrite no longer works. Safari loads the sudwrite.com web page, but will not allow me to login. The Login menu item is non-responsive. Other web pages appear to work fine, I can only assume that its something to do with sudowrite.