Let's Encrypt Community Support

Solution: Client with the currently selected authenticator does not support any combination of challenges that will satisfy the CA

Topic		Replies	Views	Activity
Using port 443 for renewal after TLS-SNI is disabled Help	39	8447	March 13, 2019
Help test Certbot Apache and Nginx fixes for TLS-SNI-01 outage Client dev	60	26258	March 10, 2018
Not able to stop using TLS-SNI-01 Help	13	1769	March 24, 2019
Issue with renewals after TLS-SNI-01 Help	26	2700	March 30, 2019
The client lacks sufficient authorization :: Invalid response from http://erp.versus-alternative.ch/.well-known/acme-challenge/ Help	12	2337	April 13, 2019