Q.What’s Wrong With My Tree?
Not sure what’s wrong with this tree. It looks like some type of fungal problem. It usually has loads of red flowers in Spring. This year there weren’t any. Not sure what type of tree it is.

Certified GKH Gardening Expert
This is definitely an infection, and it looks to be a flowering crab apple.. It could be Phytopthora (collar rot) or similar. Many diseases like this do not have a cure, but will require constant maintenance to survive. This will include regular fungicide use and keeping all dead debris away from the tree.
https://www.gardeningknowhow.com/edible/fruits/apples/apple-tree-diseases.htm
https://en.wikipedia.org/wiki/Phytophthora
https://www.gardeningknowhow.com/edible/fruits/apples/apple-tree-root-rot.htm
https://www.gardeningknowhow.com/garden-how-to/info/what-is-extension-service.htm