It seems to me that your problem depends more on the installation of Moodle than on quizzes.
So I suggest you consult the Installing and upgrading help forum, where people can surely help you.
Elephants in Kamuku National Park (CC BY-SA 4.0 Photo by Sani Ahmad Usman)
Nigeria has a wide variety of different habitats, ranging from mangrove swamps and tropical rainforest to savanna with scattered clumps of trees. About 290 species of mammal and 940 species of bird have been recorded in the country. (https://en.wikipedia.org/wiki/Wildlife_of_Nigeria)