Hello.
I get the error in the subject on 64bit Ubuntu and Debian system (32bit is fine).
I've installed from source:
-openssl-1.0.2.d
-stunnel-5.24
When first install stunnel, it complained about not being able to find an ssl library during the configure stage and said to reinstall openssl with -fPIC. I did that using the following line:
CFLAG=-fPIC ./config shared
Once I did that, stunnel installed just fine. But when I run stunnel, I get the error in the subject.
I tried reinstalling stunnel with a configure option: --with-ssl=/usr/local/ssl/. But no change.