We found a resolution to this issue by creating our own image and adding this :
FROM octopusdeploy/tentacle:latest
...
RUN sed -i 's/DEFAULT@SECLEVEL=2/DEFAULT@SECLEVEL=1/g' /etc/ssl/openssl.cnf
RUN sed -i 's/DEFAULT@SECLEVEL=2/DEFAULT@SECLEVEL=1/g' /usr/lib/ssl/openssl.cnf
...
Thank you so much for following up on this and posting the fix up, I re-opened the other forum post you linked and posted this one in there so other customers (and Support members) can see the fix for that issue!
If you need anything else reach out as we are always on hand to help but your addition of that fix will really help other customers!