Let's Debug

Test result for backend.notsweden.ch using http-01

Error
backend.notsweden.ch has an A (IPv4) record (109.164.199.149) but a request to this address over port 80 did not succeed. Your web server must have at least one working IPv4 or IPv6 address.
Get "http://backend.notsweden.ch/.well-known/acme-challenge/letsdebug-test": dial tcp 109.164.199.149:80: connect: connection refused

Trace:
@0ms: Making a request to http://backend.notsweden.ch/.well-known/acme-challenge/letsdebug-test (using initial IP 109.164.199.149)
@0ms: Dialing 109.164.199.149
@84ms: Experienced error: dial tcp 109.164.199.149:80: connect: connection refused
A test authorization for backend.notsweden.ch to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
Fetching http://backend.notsweden.ch/.well-known/acme-challenge/PUREssR3ecyMs-i2p9tVgj9meRLd9OLlzeBo3yDlxFU: Connection refused

Submitted Sep 21 14:00:57 2020. Sat in queue for 2ms. Completed in 4s. Show verbose information.