Hi Yessoh -
Based on your screenshots, if I were to guess I think that your power plants are not being dispatched correctly. Note that LEAP ignores the Historical Production variable in and after the First Simulation Year, when it uses the Dispatch Rule variable to decide how to operate the plants. If you have not touched these variables, it is likely that your Dispatch Rule is set to PercentShare and the Process Share variable is set to zero (the default values) - which means your plants would be dispatched to meet zero percent of the module requirements.
Hope this helps,