I’ve had the same issue. Had to roll back to 1.6.3
Was throwing an uncaught error “Cannot read property ‘message’ of undefined” in serialize.js @line 175
I have a screenshot of the console, but I’m not sure how to post it here.
link to previous releases for anyone who ends up here:
https://github.com/woocommerce/woocommerce-gateway-paypal-express-checkout/releases
