Problem with certificate

Dear NCP users,

I was using NCP on a raspberry 3 for a few months now and was quite happy. However, since two days I cannot login via the webinterface anymore, and my calendar apps (phone, pc,…) tell me they cannot sync because of a wrong/outdated security certificate.

Thus I tried to run the letsencrypt command to get a new one. However, I always received the error, that the verification process of the certificate did fail and I should check my A/AAAA configuration. I do have port forwarding for 80 and 443 set up on my router.

After some googling, I could renew the certificate by deactivating the “httpsonly” functionality in ncp. But still, I can’t access the webinterface of nc, nor can I sync my calendars - independent if I switch the “httpsonly” on or off.

I can access the raspberry via ssh or the RASPBERRYIPADRESS:4443 from within the network though (how I could apply the above mentioned changes).

The info panel gives the following output:

System Info

NextCloudPi version v1.10.9
NextCloudPi image NextCloudPi_11-22-18
distribution Raspbian GNU/Linux 9 \n \l
automount yes
USB devices sda
datadir /media/USBdrive/ncdata
data in SD no
data filesystem btrfs
data disk usage 931G/932G
rootfs usage 2.0G/15G
swapfile /var/swap
dbdir /var/lib/mysql
Nextcloud check ok
Nextcloud version
HTTPD service up
PHP service up
MariaDB service up
Redis service up
Postfix service up
internet check ok
port check 80 open
port check 443 open
interface eth0
NAT loopback no
uptime 11min

What else could I check/do?
Thank you

Ok, so this looks like a repetition from this issue. I could solve it for now by deleting the
/etc/letsencrypt/live/WEB_ADDRESS folder and then removing the -0001 from the folder
Hopefully that works for you too!