Short answers, pulled from the story.
The Communist Party of Ukraine (renewed) emerged in November 2000. Mykhaylo Savenko led this new group as its first chairman after previously serving as a Member of Parliament for Labour Ukraine.
Voters gave the party just 1.4% of the popular vote in the 2002 Ukrainian parliamentary election. Support dropped further to 0.29% by the time of the 2007 election and the organization did not participate in the 2012 or 2014 elections.
Ukraine enacted decommunization laws in May 2015 that banned communist symbols and activities including singing The Internationale. The Interior Ministry stripped the party of its right to participate in elections on the 24th of July 2015 under these rules.
The District Administrative Court in Kyiv officially dissolved the party on the 30th of September 2015. A report from Ukrinform confirmed the ban took effect on the 1st of October 2015 after the group failed to challenge earlier restrictions.
The parent Communist Party claimed political elites orchestrated the split to fragment their voter base. They argued the formation was instigated by the establishment rather than grassroots members during the November 2000 separation.