Thanks for the suggestion victor, I tried the changes you suggested and still receive the same error as far as I can tell.
I am still quite new to all of this, so I am not sure what you mean by ‘forcing your DNS locally to your router’. I am using the DDNS service present in the modem from my ISP (Ziggo) to update my IP on Duckdns but I did not change any other DNS related settings (so I guess the answer to your question is no?).
2023-01-30 16:25:38 {"level":"info","ts":1675092338.0252154,"logger":"http.acme_client","msg":"trying to solve challenge","identifier":"green-jungle.duckdns.org","challenge_type":"dns-01","ca":"https://acme-v02.api.letsencrypt.org/directory"}
2023-01-30 16:25:38 {"level":"error","ts":1675092338.03489,"logger":"http.acme_client","msg":"cleaning up solver","identifier":"green-jungle.duckdns.org","challenge_type":"dns-01","error":"no memory of presenting a DNS record for \"_acme-challenge.green-jungle.duckdns.org\" (usually OK if presenting also failed)"}
2023-01-30 16:25:38 {"level":"debug","ts":1675092338.206064,"logger":"http.acme_client","msg":"http request","method":"POST","url":"https://acme-v02.api.letsencrypt.org/acme/authz-v3/199451687137","headers":{"Content-Type":["application/jose+json"],"User-Agent":["Caddy/2.6.2 CertMagic acmez (linux; amd64)"]},"response_headers":{"Boulder-Requester":["939560147"],"Cache-Control":["public, max-age=0, no-cache"],"Content-Length":["812"],"Content-Type":["application/json"],"Date":["Mon, 30 Jan 2023 15:25:38 GMT"],"Link":["<https://acme-v02.api.letsencrypt.org/directory>;rel=\"index\""],"Replay-Nonce":["C878Mo7FOGhN5JyhIqEdFWwdNeYQ3PdgkMHBrcDRE9Oyabw"],"Server":["nginx"],"Strict-Transport-Security":["max-age=604800"],"X-Frame-Options":["DENY"]},"status_code":200}
2023-01-30 16:25:38 {"level":"error","ts":1675092338.2061532,"logger":"tls.obtain","msg":"could not get certificate from issuer","identifier":"green-jungle.duckdns.org","issuer":"acme-v02.api.letsencrypt.org-directory","error":"[green-jungle.duckdns.org] solving challenges: presenting for challenge: could not determine zone for domain \"_acme-challenge.green-jungle.duckdns.org\": could not find the start of authority for _acme-challenge.green-jungle.duckdns.org.: NOERROR (order=https://acme-v02.api.letsencrypt.org/acme/order/939560147/161890809247) (ca=https://acme-v02.api.letsencrypt.org/directory)"}
2023-01-30 16:25:38 {"level":"debug","ts":1675092338.206165,"logger":"tls.obtain","msg":"trying issuer 2/2","issuer":"acme.zerossl.com-v2-DV90"}
2023-01-30 16:25:38 {"level":"info","ts":1675092338.2225828,"logger":"http","msg":"waiting on internal rate limiter","identifiers":["green-jungle.duckdns.org"],"ca":"https://acme.zerossl.com/v2/DV90","account":"caddy@zerossl.com"}
2023-01-30 16:25:38 {"level":"info","ts":1675092338.2226262,"logger":"http","msg":"done waiting on internal rate limiter","identifiers":["green-jungle.duckdns.org"],"ca":"https://acme.zerossl.com/v2/DV90","account":"caddy@zerossl.com"}
2023-01-30 16:25:38 {"level":"debug","ts":1675092338.4358559,"logger":"http.acme_client","msg":"http request","method":"GET","url":"https://acme.zerossl.com/v2/DV90","headers":{"User-Agent":["Caddy/2.6.2 CertMagic acmez (linux; amd64)"]},"response_headers":{"Access-Control-Allow-Origin":["*"],"Content-Length":["645"],"Content-Type":["application/json"],"Date":["Mon, 30 Jan 2023 15:25:38 GMT"],"Server":["nginx"],"Strict-Transport-Security":["max-age=15724800; includeSubDomains"]},"status_code":200}
2023-01-30 16:25:40 {"level":"debug","ts":1675092340.2941976,"logger":"http.acme_client","msg":"http request","method":"HEAD","url":"https://acme.zerossl.com/v2/DV90/newNonce","headers":{"User-Agent":["Caddy/2.6.2 CertMagic acmez (linux; amd64)"]},"response_headers":{"Access-Control-Allow-Origin":["*"],"Cache-Control":["max-age=0, no-cache, no-store"],"Content-Type":["application/octet-stream"],"Date":["Mon, 30 Jan 2023 15:25:40 GMT"],"Link":["<https://acme.zerossl.com/v2/DV90>;rel=\"index\""],"Replay-Nonce":["ofI7bwTTn2_C9r7qPM47YqwX_2GVsjkMB2VA2DuXKz8"],"Server":["nginx"],"Strict-Transport-Security":["max-age=15724800; includeSubDomains"]},"status_code":200}
2023-01-30 16:25:42 {"level":"debug","ts":1675092342.2248738,"logger":"http.acme_client","msg":"http request","method":"POST","url":"https://acme.zerossl.com/v2/DV90/newOrder","headers":{"Content-Type":["application/jose+json"],"User-Agent":["Caddy/2.6.2 CertMagic acmez (linux; amd64)"]},"response_headers":{"Access-Control-Allow-Origin":["*"],"Cache-Control":["max-age=0, no-cache, no-store"],"Content-Length":["286"],"Content-Type":["application/json"],"Date":["Mon, 30 Jan 2023 15:25:42 GMT"],"Location":["https://acme.zerossl.com/v2/DV90/order/QeHNtELUZwRb-vvJHD5jWA"],"Replay-Nonce":["9KCBejd4WZrrnvQsv8YqW1NW-uBtEAy3ERUjjgD5980"],"Server":["nginx"],"Strict-Transport-Security":["max-age=15724800; includeSubDomains"]},"status_code":201}
2023-01-30 16:25:43 {"level":"debug","ts":1675092343.5737739,"logger":"http.acme_client","msg":"http request","method":"POST","url":"https://acme.zerossl.com/v2/DV90/authz/zVjDRyhCrHTmRO_Gzjdo7g","headers":{"Content-Type":["application/jose+json"],"User-Agent":["Caddy/2.6.2 CertMagic acmez (linux; amd64)"]},"response_headers":{"Access-Control-Allow-Origin":["*"],"Cache-Control":["max-age=0, no-cache, no-store"],"Content-Length":["454"],"Content-Type":["application/json"],"Date":["Mon, 30 Jan 2023 15:25:43 GMT"],"Link":["<https://acme.zerossl.com/v2/DV90>;rel=\"index\""],"Replay-Nonce":["eQ1L4s_kYwvJl6NUeJRTSPNZAoPKyJMe_selBwXmNFU"],"Retry-After":["5"],"Server":["nginx"],"Strict-Transport-Security":["max-age=15724800; includeSubDomains"]},"status_code":200}
2023-01-30 16:25:43 {"level":"info","ts":1675092343.5746574,"logger":"http.acme_client","msg":"trying to solve challenge","identifier":"green-jungle.duckdns.org","challenge_type":"dns-01","ca":"https://acme.zerossl.com/v2/DV90"}
2023-01-30 16:25:43 {"level":"error","ts":1675092343.6096714,"logger":"http.acme_client","msg":"cleaning up solver","identifier":"green-jungle.duckdns.org","challenge_type":"dns-01","error":"no memory of presenting a DNS record for \"_acme-challenge.green-jungle.duckdns.org\" (usually OK if presenting also failed)"}
2023-01-30 16:25:44 {"level":"debug","ts":1675092344.840714,"logger":"http.acme_client","msg":"http request","method":"POST","url":"https://acme.zerossl.com/v2/DV90/authz/zVjDRyhCrHTmRO_Gzjdo7g","headers":{"Content-Type":["application/jose+json"],"User-Agent":["Caddy/2.6.2 CertMagic acmez (linux; amd64)"]},"response_headers":{"Access-Control-Allow-Origin":["*"],"Cache-Control":["max-age=0, no-cache, no-store"],"Content-Length":["136"],"Content-Type":["application/json"],"Date":["Mon, 30 Jan 2023 15:25:44 GMT"],"Link":["<https://acme.zerossl.com/v2/DV90>;rel=\"index\""],"Replay-Nonce":["k7OynA486FLF3_x-81kj6pvZ4JGWqH8SYuvXoNg1oHQ"],"Retry-After":["86400"],"Server":["nginx"],"Strict-Transport-Security":["max-age=15724800; includeSubDomains"]},"status_code":200}
2023-01-30 16:25:44 {"level":"error","ts":1675092344.8410318,"logger":"tls.obtain","msg":"could not get certificate from issuer","identifier":"green-jungle.duckdns.org","issuer":"acme.zerossl.com-v2-DV90","error":"[green-jungle.duckdns.org] solving challenges: presenting for challenge: could not determine zone for domain \"_acme-challenge.green-jungle.duckdns.org\": could not find the start of authority for _acme-challenge.green-jungle.duckdns.org.: NOERROR (order=https://acme.zerossl.com/v2/DV90/order/QeHNtELUZwRb-vvJHD5jWA) (ca=https://acme.zerossl.com/v2/DV90)"}
2023-01-30 16:25:44 {"level":"debug","ts":1675092344.84111,"logger":"events","msg":"event","name":"cert_failed","id":"be8bf62c-6995-40cc-be51-862c7c79e1c3","origin":"tls","data":{"error":{},"identifier":"green-jungle.duckdns.org","issuers":["acme-v02.api.letsencrypt.org-directory","acme.zerossl.com-v2-DV90"],"renewal":false}}
2023-01-30 16:25:44 {"level":"error","ts":1675092344.841488,"logger":"tls.obtain","msg":"will retry","error":"[green-jungle.duckdns.org] Obtain: [green-jungle.duckdns.org] solving challenges: presenting for challenge: could not determine zone for domain \"_acme-challenge.green-jungle.duckdns.org\": could not find the start of authority for _acme-challenge.green-jungle.duckdns.org.: NOERROR (order=https://acme.zerossl.com/v2/DV90/order/QeHNtELUZwRb-vvJHD5jWA) (ca=https://acme.zerossl.com/v2/DV90)","attempt":1,"retrying_in":60,"elapsed":7.9131817,"max_duration":2592000}