Hi Thanks for replying.
Sorry for my ignorance but where should I enter this data?
Can you give me a step by step or a link explaining how to do it?
I am so grateful!
IF is in cloudflare, i include two register 
But the error persits
> [Mon Jun 14 16:57:20 -03 2021] Multi domain='DNS:casanovarj.com.br,DNS:www.casanovarj.com.br'
> [Mon Jun 14 16:57:20 -03 2021] Getting domain auth token for each domain
> [Mon Jun 14 16:57:22 -03 2021] Getting webroot for domain='casanovarj.com.br'
> [Mon Jun 14 16:57:22 -03 2021] Getting webroot for domain='www.casanovarj.com.br'
> [Mon Jun 14 16:57:22 -03 2021] You need to add the txt record manually.
> [Mon Jun 14 16:57:22 -03 2021] Add the following TXT record:
> [Mon Jun 14 16:57:22 -03 2021] Domain: '_acme-challenge.casanovarj.com.br'
> [Mon Jun 14 16:57:22 -03 2021] TXT value: '3LEu29xsvVesB0RpnSqOjrgvOmGQwrsNU8Xv9WyTKaw'
> [Mon Jun 14 16:57:22 -03 2021] Please be aware that you prepend _acme-challenge. before your domain
> [Mon Jun 14 16:57:22 -03 2021] so the resulting subdomain will be: _acme-challenge.casanovarj.com.br
> [Mon Jun 14 16:57:22 -03 2021] **You need to add the txt record manually.**
> [Mon Jun 14 16:57:22 -03 2021] Add the following TXT record:
> [Mon Jun 14 16:57:22 -03 2021] Domain: '_acme-challenge.www.casanovarj.com.br'
> [Mon Jun 14 16:57:22 -03 2021] TXT value: 'nz-Wam54CbiAN6J_-7GRgbCZfyj9W8RG5a0LVpv7bm0'
> [Mon Jun 14 16:57:22 -03 2021] Please be aware that you prepend _acme-challenge. before your domain
> [Mon Jun 14 16:57:22 -03 2021] so the resulting subdomain will be: _acme-challenge.www.casanovarj.com.br
> ,
> Command Error: [Mon Jun 14 16:57:22 -03 2021] **Can not find dns api hook for: dns_CF**
> [Mon Jun 14 16:57:22 -03 2021] Can not find dns api hook for: dns_CF
> [Mon Jun 14 16:57:22 -03 2021] Please add the TXT records to the domains, and re-run with --renew.