/domoticz/domoticz: error while loading shared libraries: libssl.so.1.0.0: cannot open shared object file: No such file or directory
In stretch, libssl is at version 1.1.0. Solution for me (64bit Debian Stretch):
1) Download https://packages.debian.org/jessie/amd64/libssl1.0.0/download
2) dpkg -i libssl1.0.0*