Configure ACME method for dyndns

Hi,

My trying to auth my dyndns domain using ACME on Pfsense.
But I keep receiving the following msg.

Webserver
Renewing certificate
account: Mywebserver
server: letsencrypt-staging-2

/usr/local/pkg/acme/acme.sh --issue -d ‘webserver.dyndns-web.com’ --dns ‘dns_dyn’ --home ‘/tmp/acme/webserver/’ --accountconf ‘/tmp/acme/webserver/accountconf.conf’ --force --reloadCmd ‘/tmp/acme/webserver/reloadcmd.sh’ --log-level 3 --log ‘/tmp/acme/webserver/acme_issuecert.log’
Array
(
[path] => /etc:/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin/
[PATH] => /etc:/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin/
[DYN_Customer] => [USERNAME]
[DYN_Username] => [MY API CODE]
[DYN_Password] => [MY PASSWORD]
)
[Tue Mar 24 13:17:08 AST 2020] Single domain=‘webserver.dyndns-web.com
[Tue Mar 24 13:17:09 AST 2020] Getting domain auth token for each domain
[Tue Mar 24 13:17:11 AST 2020] Getting webroot for domain=‘webserver.dyndns-web.com
[Tue Mar 24 13:17:11 AST 2020] Adding txt value: wKxQiYm_5H40nrz8wv0QtAphMEYyIwdmSoGMigih3kA for domain: _acme-challenge.webserver.dyndns-web.com
[Tue Mar 24 13:17:11 AST 2020] Start Dyn API Session
[Tue Mar 24 13:17:12 AST 2020] get token failed
[Tue Mar 24 13:17:12 AST 2020] Error add txt for domain:_acme-challenge.webserver.dyndns-web.com
[Tue Mar 24 13:17:12 AST 2020] Please check log file for more details: /tmp/acme/webserver/acme_issuecert.log
[Tue Mar 24 13:17:13 AST 2020] Please refer to https://curl.haxx.se/libcurl/c/libcurl-errors.html for error code: 35

My question is what do I have to do here?
And how do I add a txt for my domain on dyn.com is that even posible?