PARIS – The presidents of Ukraine and Russia agreed Monday to revive the peace process on the bloody separatist conflict in eastern Ukraine and exchange all their prisoners, but they failed to resolve crucial issues such as a timeline on local elections and control of the borders in the rebel-held region. At the first meeting between new Ukrainian President Volodymyr Zelenskiy and Russian President Vladimir Putin, the two leaders failed to find a compromise to bring an end to the 5-year-old war that has killed 14,000 people, emboldened the Kremlin and reshaped European geopolitics. But they did agree to try again in four months to find new solutions, said French President Emmanuel Macron, who mediated the talks along with German Chancellor Angela Merkel and called them “fruitful” in that it brought all four leaders together. “There are disagreements, especially on timeline and next steps.