Manipulative exaggeration and fake headline.
The official statement by Ukraine's Ministry of Internal Affairs at 14:00 on April 21 claimed that they received 562 reports of election irregularities, while during the first round of the presidential elections, at the exact time (14:00), they received 522 reports of election irregularities. Therefore, there is no evidence to support a sharp increase of violations compared to the first round.
In general, the National Police of Ukraine received almost 2500 reports of violations during the first round.
At 19:00 on April 21, there were 1167 reports of violations, according to the Ukrainian Ministry of Internal Affairs.
According to international observers, the Ukrainian presidential election was the cleanest in the country's history.
Read similar disinformation cases on Ukraine's elections here and here.