Companion app not accepting valid certificate

Hi All,

I’m in need for some directional advice. I recently setup a domain name to access my home assistant instance. The SmartThing addon required a webhook with SSL. I have everything setup and working, except for the companion app on an external connection. I keep receiving this error within the companion app:

“The home assistant certificate is unsafe, check the certificate or setting and try again.”

So this is what i have setup:

  • Bought a domainname and edited the DNS to forwarded it to the static IP adress of my ISP;
  • Setup the port forwarding for port 443 to 443 on the local IP adress of HA;
  • Installed Let’s Encrypt addon and ran it once to acquire a valid certificate;
  • Installed the Nginx Reverse Proxy addon and executed the dns-challenge;
  • I now have access on my 192.168.x.x ip (without SSL) or through my domain name (with SSL).

Once I access the domain name though my browser everything seems to be fine:

A checkup from SSL lab

Once I enter my domain name as the “Home Assistant URL” in the companion app I get the “The home assistant certificate is unsafe, check the certificate or setting and try again.” error.

What am i missing here?

Thanks in advance for any help!

Same here! With a valid certificate from the let’s encrypt Addon. This started yesterday

Edit : solved by restarting the nginx addon that was serving Home Assistant