The shutdown of tls-sni-01 doesn't affect the http-01 challenge, so the workaround is to switch your code over to the latter if this is affecting you. We're us

The shutdown of tls-sni-01 doesn't affect the http-01 challenge, so the workaround is to switch your code over to the latter if this is affecting you. We're using Greenlock (https://github.com/Daplie/node-greenlock https://github.com/Daplie/node-greenlock, previously node-letsencrypt via npm) for our app (https://Clearalias.com https://Clearalias.com) and this library supports switching challenges fairly easily. It's even easier if you're just using an Express server, since you can use a Node library like Greenlock-express (https://github.com/Daplie/greenlock-express https://github.com/Daplie/greenlock-express, previously known as letsencrypt-express), which makes it dead simple to use http-01. Best of luck to anyone who's scrambling to fix their cert layer right now. It seems like there's a chance the TLS-SNI challenge stays disabled, so it's best not to hold your breath and instead quickly switch to a different challenge mode if you get a chance.