I am getting this error ....
2020/10/20 21:08:04.874624 [TLS] Requesting certificate for ad75da933e98.channelsdvr.net
2020/10/20 21:08:23.885773 [TLS] Certificate generation failed. Trying again while waiting for 5 consecutive responses: acme: Error -> One or more domains had a problem:
[*.ad75da933e98.channelsdvr.net] acme: error: 400 :: urn:ietf:params:acme:error:dns :: DNS problem: NXDOMAIN looking up TXT for _acme-challenge.ad75da933e98.channelsdvr.net - check that a DNS record exists for this domain, url:
[ad75da933e98.channelsdvr.net] acme: error: 400 :: urn:ietf:params:acme:error:dns :: During secondary validation: DNS problem: NXDOMAIN looking up TXT for _acme-challenge.ad75da933e98.channelsdvr.net - check that a DNS record exists for this domain, url:
2020/10/20 21:08:23.960603 [ERR] Generating SSL cert failed: acme: error: 429 :: POST :: https://acme-v02.api.letsencrypt.org/acme/new-order :: urn:ietf:params:acme:error:rateLimited :: Error creating new order :: too many failed authorizations recently: see https://letsencrypt.org/docs/rate-limits/, url: