Remember that Venezuelan president, Nicolas Maduro is a virtual puppet of Cuba. Going back years, during the 50th anniversary of the Cuban revolution, Chavez hosted President Yoweri Museveni, then president of Uganda. Cuba was known over the years to give scholarships to Ugandans. The relationship is long and deep.
Then as recently as February of 2019, the Kampala is allegedly investigating that top Venezuelan politicians are using Ugandan passports to smuggle key people out of Venezuela into China and possibly other countries that stand with the Maduro regime.