UE4Editor wont exit properly ( Linux )


i installed UE4 recently and was trying things out when i noticed that when exiting the editor with present changes in the project, the editor wont exit properly.
it stops at tearing down SDL
i have given it 1h and still nothing happened.
could anybody help, i am a total beginner when it comes to engines.

i am using the editor with vulkan.
my OS is Ubuntu Mate 18.04