Hello,
There is error on your demo site http://docs.webix.com/samples/64_file_manager/04_loading/01_dynamic_loading.html and I met the same problem in my solution.
Try to search any file with dynamic data loading in filemanager. When you see result you can’t select any row and get an JS error “Uncaught TypeError: Cannot read property ‘$parent’ of undefined”. How can I fix it?