After upgrading latest domoticz beta on Debian 10 I’ve faced following issue: domoticz: error while loading shared libraries: libssl.so.1.0.0: cannot open shared object file: No such file or directory Resolution is quite simple: wget https://packages.debian.org/jessie/libssl1.0.0 dpkg -i libssl1.0.0_1.0.1t-1+deb8u8_amd64.deb