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

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Topic		Replies	Views	Activity
Using port 443 for renewal after TLS-SNI is disabled Help	37	8801	February 11, 2019
Help test Certbot Apache and Nginx fixes for TLS-SNI-01 outage Client dev	55	26545	February 8, 2018
Not able to stop using TLS-SNI-01 Help	12	1882	February 22, 2019
Issue with renewals after TLS-SNI-01 Help	25	2900	February 28, 2019
The client lacks sufficient authorization :: Invalid response from http://erp.versus-alternative.ch/.well-known/acme-challenge/ Help	11	2406	March 14, 2019