Struggling to solve PowerSystems.Systems

Hello,
I’m new at Julia programming and currently I’m trying to familiarize myself with instruments to solve OPF and economic dispatch in Julia. I wrote this simple example

Numerical data there is mostly random, since I only would like to have 100% working code for future experiments. But I faced with issue:


I validated components individually, seems that they are fine. But I cannot perform working simulation. Can anyone highlight any issue which causes that fault? Or refer me to simple working example.