Failed authorization procedure

Hi @dieselfreak

there are a lot of older certificates.

Issuer not before not after Domain names LE-Duplicate next LE
Let's Encrypt Authority X3 2019-10-17 2020-01-15 nextcloud.regener8.cf
1 entries
Let's Encrypt Authority X3 2019-07-15 2019-10-13 nextcloud.regener8.cf
1 entries
Let's Encrypt Authority X3 2019-04-29 2019-07-28 nextcloud.regener8.cf
1 entries
Let's Encrypt Authority X3 2019-01-20 2019-04-20 nextcloud.regener8.cf
1 entries

Your old topic

There you have used webroot. An open port 80 is required to create a certificate, not a timeout.