Latest Opera browser is 34 (.deb and Win). It refuses to display pages protected by letsencrypt at https://wiki.koha-community.org. After much searching, I have “force fed” it:
- ISRG Root X1
- Let’s Encrypt Authority X1 (IdenTrust cross-signed)
- Let’s Encrypt Authority X2 (IdenTrust cross-signed)
- DST Root CA X3
which all appear to be properly installed. But still cannot get past the message “the server presented an invalid certificate. You cannot proceed because the website operator has requested heightened security for this domain.” The page in question display fine in Firefox.
Where next, please. Tnx – Paul