KYIV, Ukraine (AP) — Energy problems plagued Ukraine and Europe as much of the Russian-occupied region that's home to a largely crippled nuclear power plant was reported temporarily in blackout Sunday.Only one of six reactors at the Zaporizhzhia facility was connected to the electricity grid, and Russia’s main pipeline carrying natural gas to Germany remained shut down.The fighting in Ukraine and related disputes over pipelines lie behind the electricity and natural gas shortfalls that have worsened as Russia's war in Ukraine, which began on Feb. 24, grinds on for a seventh month.Both issues will take center stage this week. U.N....