The criminal enterprises that have been running Venezuela (Cubans, Drug/human Traffickers, Chavez oligarchy leftovers) have left the Venezuelan people to starve. The Cubans are worried about losing their sugar daddy.

Cuba plunged into a withering crisis after the crumbling Soviet Union stopped its massive subsidies to the island. If Venezuelan subsidies are halted, the experts say the island might suddenly lose 10 to 12 percent of its GDP, basing their estimates on already dubious official Cuban figures.

https://www.miamiherald.com/latest-news/article225520320.html

People are going hungry in Venezuela. Maduro won't let American Aid into the country. On Wednesday morning, a Venezuelan military boat carrying 100 tons (tonnes) of aid landed in Havana. Cuba was recently hit by a tornado.

In Venezuela, the 23,000 Cubans who work on official government missions have received orders to remain at their posts.