I have just experienced this after rebooting my RP3. It’s the first time I have rebooted it after setting up SSL but that works fine so unsure what the issue is. I get the error for both Nest and DuckDNS. On the dash it says:
Invalid config: the following components could not be set up:
Nest
DuckDNS
However I have not changed the config for these and if I run a config check it’s all OK.
I am running HASS 0.62.1