i think this may be a 'known issue' of the fileupload plugin, but i am checking if there is an update. i think you have to choose from: use ajax upload = YES: can upload multiple images and drag and drop, but can't use in a repeating group or use ajax upload = NO: can select one image, can not drag and drop. but can include repeat group. my use-case is that i would like to have two other fields like 'category' (contract/receipt/etc) and description for groups of images and want drag and drop also. like this: View attachment 17351 but i get a .js error Uncaught TypeError: Cannot read property 'H5Form' of null when using ajax uploading in a repeating group. is this a known issue or something on my setup.