I installed let’s encrypt yesterday for my Raspi nextcloud. The nextcloud is setup to use ports 801 and 4433. To install the certificate, I temporarily routed external ports 80 and 443 to the above ports and started the lets encrypt process via my dyndns address. Afterwards I reconfigured my router again.
The access to the nextcloud from a browser works pretty well. The certificate is up and running.
As soon as I want to connect with my android apps, the connection is refused: I logged out and try to login via the dyndns address. The password is accepted since I am forwarded to the TTOP. But afterwards I will directed to the first mask again to enter the server address.
Any idea how to get rid of the problem?