Lets Encryt certificate generation error

[fetoa (kalderista)]

I found the solution on this post (thanks to @Bradbpw):

Error when updating LetsEncrypt cert

@Bradbpw Pls check my screenshot which one @jerrm mentioned before. Also pls check your PBX Hostname must be the same as a FQDN name. If not Let’s Encrypt doesn’t works. First you need to fix your PBX Hostname. [49] [16] Thanks. Shahin

Hostname must be same as FQDN.

Regards