i have the exact same issue with my domain hosted in cloudflare.how did you manage to make it work?
[Wed May 13 00:00:06 CEST 2020] _on_issue_err[Wed May 13 00:00:06 CEST 2020] Error add txt for domain:_acme-challenge.***************[Wed May 13 00:00:06 CEST 2020] Error
Similar thing with cloudflare DNS validation, which stopped working about 2 weeks ago due to some faulty regex.It also got fixed with v2.8.6:https://github.com/acmesh-official/acme.sh/issues/2888An update would be much appreciated.I also tested it by updating /usr/local/share/examples/acme.sh/dnsapi/dns_cf.shwith dnsapi/dns_cf.sh from the 2.8.6 release.(https://github.com/acmesh-official/acme.sh/releases/tag/2.8.6)It works fine now.Maybe someone should contact the package maintainer? His/her email address is listed in the package list in opnsense, I just don't want to bother anyone so i didn't write a mail. (Also I am a free user, so no support for me anyway.)