Your connection is not secure - periodically, why?

Question

Digital certificates

Good time!
https://topir.ru/ - works fine, but from time to time I see this picture:


I can’t understand the reason for the error, it pops up in all browsers, for 10-15 minutes, I can’t understand the reason or the sequence ....

Who came across ?

PS: Here's what's in the add. information:

Answer 1

See additional information and the certificate that came from the server. Maybe your provider is trying to configure SORM and does it wrong))

Answer 2

Check the domain on ssl checkers:
https://www.sslchecker.com/sslchecker
https://www.ssllabs.com/ssltest/analyze.html?d=top...
There are configuration errors there.
It is also possible there that different IPs are issued in DNS periodically, then on different IPs there are different SSL settings.
Try to ping topir.ru at the moment when it works and at the moment when it doesn't work - check the IP addresses.
In general, this is what I got - joxi.ru/Dr8nLkDSkqnMe2.png
It looks like everything is more complicated here than I suggested.
In Chrome, the error about the content constantly blinks, but the page eventually loads.