Using ACME in pfSense with deSEC

[kuschi]

I was wondering if anyone had experience with issuing/renewing a Let’s Encrypt certificate in pfSense using the ACME package. There is a method for deSEC.io available but I get an error message:

[Mon Jun 7 22:01:52 CEST 2021] Adding record
[Mon Jun 7 22:01:52 CEST 2021] Add txt record error.
[Mon Jun 7 22:01:52 CEST 2021] Error add txt for domain:_acme-challenge.my_domain

I googled now for a while to find a solution but no luck so far. Any suggestions?

Thanks,
Martin