I cannot update existing galleries anymore.
When I try to edit a gallery (sliding or grid, doesn't matter) I can delete the existing image from it, but I cannot add any new. It lets me select an image I want to add, but after I click on the image in the media library, it returns to the page again showing no result. I was hoping updating the theme will help me with this issue, but it didn't.
The issue was solved in the other ticket.