In Chrome/Opera Windows 7 browsers - NET::ERR_CERT_AUTHORITY_INVALID error. How to fix?

Question

Opera

At the same time, https://www.google.com - the certificate works
But:
https://toster.ru/ - already swears at the certificate that it is not valid (NET::ERR_CERT_AUTHORITY_INVALID)

Answer 1

Verify the root certificate of the CA. If it doesn't exist, add it.

Answer 2

do not use the beta version of the browser. or too old version. but in your case, the first option is more likely.