Today I was not able to connect from my XA2 with SFOS 4.1 to my TT-RSS server, which uses a Let’s Encrypt SSL certificate.
Checking with my workstation browser all looked ok, so as I remember that this week the old root cert was expiring today (see DST Root CA X3 Expiration (September 2021) - Let's Encrypt ) I added the new ‘ISRG Root X1’ root cert, by copying it to
/etc/pki/ca-trust/source and running
update-ca-trust. And the issue got solved.
I assume that SailfishOS (at least 4.1, I haven’t updated yet to 4.2) has only ‘DST Root CA X3’ ?
If somebody confirms I can open a proper bug report for the sailors.