Please mind, that you nowadays also need OpenSSL 1.1 for “the WWW to work”, hence on SailfishOS < 4.0.1 one must:
Install a newer OpenSSL package from here: OpenSSL 1.1.1 + 1.0.2 | OpenRepos.net — Community Repository System
If you are doing this manually (without Storeman), you also have to download the OpenSSL -libs RPM (omit the -devel RPM): openssl-libs 1.1.1 + 1.0.2 | OpenRepos.net — Community Repository System
When using the command line, you have to install these in one go (using the ARMv7 RPMs for e.g., a Jolla1 in this example):
pkcon install-local openssl-1.1.1kgit1-1.7.4.jolla_.armv7hl.rpm openssl-libs-1.1.1kgit1-1.7.4.jolla_.armv7hl.rpm