Thu Mar 23, 2023 11:49 am
LetsEncrypt has a global limit of how many certificate requests are granted per top level domain. Since DynDNS service, provided by Miktrotik, uses "mynetname.net" as TLD, there are large number of users trying to get LetsEncrypt certificate for their xxxxx.sn.mynetname.net device. This get worse when users, not knowing precisely what they are doing, request certificate multiple times. Which eats into quota per TLD.
Unfortunately there's nothing you can do ... other than trying again after the time, indicated in error message (Z after time is time zone UTC ... calculate your local time from that).