I am using the platform theme by Pagelines. The free version.
When I try to attach an image to a post I first click add media then select then I select an image. This works ok.
But when I try to click Insert into post the Add Media window closes and nothing happens.
If I add an image using html code inside the post itself that works but it is not a satifactory way to fix the problem.
I am a begginner with CSS code etc.
I have tried deactivating all plugins but that didn't resolve the problem.