Remote Access using a FritzBox & the AVM myFritz DDNS Service

Yes I believe the certificates are correct:

The letsencrypt settings:

domains:
  - xxxxx.myfritz.net
email: [email protected]
keyfile: myfritzprivkey.pem
certfile: myfritzfullchain.pem
challenge: http
dns: {}

Here is the ssl folder where the certificates are stored:
grafik

The 2 bottom port forwards seem to be from the IPv6. I deleted those in the fritz.box.

These are the settings now:

The nginx add-on asks for the MariaDB in the description. It gave me an error when I installed it withou? https://github.com/hassio-addons/addon-nginx-proxy-manager/blob/43aa9f96a4283f3ef74055be8f4a1ddd1ee818e1/proxy-manager/DOCS.md Under installation 1)

It still does not work unfortunately.