Running 3 different dynamic dns. One of them ddnss.de, using ssl/https for updates (ipv4 only)
However,
a) in openwrt 19.07.2 it shows the status Last update / Next update as Never / Verify
and in the logfile
112220 ERROR : IP update not accepted by DDNS Provider
112220 : Waiting 1440 seconds (Check Interval)
b) whereas in the ddnss account (on their webpage) it indicates the correct IP and the correct number of updates but nothing in the update log
I have changed the DDNS provider to "no-ip.pl" and it is working now. DDNSS.DE has been retried due to an error and the update has been unavailable, causing the website to tell me that "the number of changes today has reached the upper limit."
It's really funny, I made a fresh install, where I had to update some luci packages (19.07.2) in order to make luci-app-ddns run.
-> Now everything works correctly. -> just update the luci-app-ddns package.