EDIT: This probably applies to all Apple devices, not just the older ones. Hi, does anyone notice problems with lets encryp on older apple devices? Alternatively, how to solve it? They see the certificate, but they consider it untrustworthy. It can affect that openssl writes: verify error: num = 20: unable to get local issuer certificate verify error: num = 21: unable to verify the first certificate Verify return code: 21 (unable to verify the first certificate) Thanks so much for the advice.