Adding existing ABP solution
ABP Suite requires an ABP solution to work on, that's why when you start it, you need an ABP Solution and it should be added in ABP Suite UI.
Add an existing solution
Add your existing solution which was created from the ABP Studio or ABP CLI. You have to enter your YourProject.sln
file path. Also, it works if you enter the directory of the YourProject.sln
when there's single solution inside.