ui/handlers: response 404 when repository not found
Created by: unknwon
This PR addresses #4826 and responses 404 to the UI if the error is not clone-able because of "repository not found".
Test plan: Tested locally and CI
Created by: unknwon
This PR addresses #4826 and responses 404 to the UI if the error is not clone-able because of "repository not found".
Test plan: Tested locally and CI